Terms starting with G.

G. Evelyn Hutchinson

G. Evelyn Hutchinson was an American ecologist regarded as the father of modern ecology, whose work transformed ecology from natural history into a quantitative science of ecosystems. He founded modern limnology with his Treatise on Limnology, formulated the ecological niche concept, and in 1961 described the paradox of the plankton, asking how so many species coexist while competing for the same resources. He was also among the earliest scientists to warn, from the late 1940s, that rising atmospheric carbon dioxide could warm the planet.

Example: His 1961 paper on the paradox of the plankton asked why dozens of phytoplankton species coexist despite competing for the same nutrients and light.

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G.D. Birla

Ghanshyam Das Birla was a leading Indian industrialist and nationalist capitalist of the freedom era, founder of the Birla business empire. He supported the Congress financially, advised Gandhi on economic matters and was one of the eight signatories of the Bombay Plan of 1944. His career illustrates the alliance between Indian capital and the national movement. For UPSC, Birla is the classic example of the nationalist bourgeoisie in the freedom struggle.

Example: The Bombay Plan (1944), which he co-authored with seven other industrialists

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G.D. Birla, Jamnalal Bajaj, J.R.D. Tata and Walchand Hirachand

These four were leading Indian industrialists of the nationalist era who combined business success with support for the freedom movement. Birla and J.R.D. Tata co-authored the Bombay Plan of 1944, Jamnalal Bajaj was Gandhi's close associate and Congress treasurer, and Walchand Hirachand pioneered indigenous shipping and aircraft manufacture. For UPSC, they exemplify the nationalist capitalist class that backed the Congress and helped shape independent India's economic vision.

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G.S. Ghurye

Govind Sadashiv Ghurye is regarded as the founder of Indian sociology. His 1932 work Caste and Race in India pioneered the sociological study of caste using an Indological, text-based approach. He headed Bombay University's sociology department for decades and trained a generation of Indian sociologists. For UPSC, Ghurye represents the Indological school of Indian sociology and is the standard reference for caste studies.

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G.S. Ghurye and M.N. Srinivas (functionalism)

G.S. Ghurye and M.N. Srinivas were pioneering Indian sociologists associated with the functionalist study of Indian society. Ghurye applied an Indological functionalism to caste and kinship, while Srinivas used structural-functional fieldwork, developing concepts like Sanskritisation, westernisation and the dominant caste from his Rampura village study. For UPSC, they represent the two foundational approaches, textual and field-based, of Indian sociology.

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G20

G20 is the premier forum for international economic cooperation, comprising 19 countries plus the European Union and the African Union. Born as a finance-ministers' group in 1999 after the Asian financial crisis, it was elevated to leaders' summits in 2008. The African Union became a permanent member in 2023. For UPSC, the G20 is GS-2 staple: India's 2023 presidency showcased its Global South leadership and summit diplomacy.

Example: The 18th G20 Summit in New Delhi in September 2023, which admitted the African Union and adopted the New Delhi Declaration.

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G20 Global Land Initiative

The G20 Global Land Initiative is a G20 programme on reducing land degradation and enhancing conservation of terrestrial habitats, launched at the Riyadh Summit in November 2020. Its ambition is to prevent, halt and reverse land degradation and achieve a 50 percent reduction in degraded land by 2040, implemented with an initiative coordination office under the UN Convention to Combat Desertification in Bonn. It works on a voluntary basis through knowledge sharing, private sector engagement and showcasing restoration success stories.

Example: India's Aravalli Green Wall and its Bonn Challenge pledge of restoring 26 million hectares by 2030 align with the initiative's land restoration ambition.

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G20 Tourism Working Group meeting

The G20 Tourism Working Group meeting held in Srinagar in May 2023 was the first major international event in Kashmir after the Article 370 abrogation. It matters as the government's showcase of normalcy and the tourism revival in the Valley.

Example: The May 2023 Srinagar meeting signalling Kashmir's return to the global stage

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G20 Troika

The G20 Troika is the informal grouping of the previous, current and incoming G20 presidencies, which work together to ensure continuity in the forum's agenda across summits. The outgoing president hands over priorities to the current one while the incoming president prepares its own agenda. For UPSC, the Troika is a standard one-liner on the G20's working method and appears in questions on global governance and summit diplomacy.

Example: India (2023 presidency) handing over to Brazil (2024 presidency)

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G2B

G2B (Government to Business) is an e-governance interaction model in which the government delivers services and information to businesses online, such as company registration, tax filing, licences, permits and e-procurement. It reduces compliance costs and corruption by digitizing business-facing processes. For UPSC, G2B is a standard model in e-governance answers, alongside G2C, G2E and G2G.

Example: The MCA21 portal for online company filings and compliance

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G2E

G2E (Government to Employee) is the e-governance model covering digital services and processes for government employees, such as online attendance, payroll, leave management, transfers, training and internal communication. It improves administrative efficiency and transparency in personnel management. For UPSC, G2E completes the four-model e-governance framework of G2C, G2B, G2G and G2E asked in governance questions.

Example: SPARROW, the online system for recording annual performance appraisals

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G2G

G2G (Government to Government) is the e-governance model of digital interaction between government agencies and departments, such as data sharing, inter-departmental clearances, budget transfers and coordinated project monitoring. It enables integrated, paperless administration. For UPSC, G2G underpins platforms like PRAGATI and PM Gati Shakti and completes the four-model e-governance framework.

Example: PRAGATI (Pro-Active Governance and Timely Implementation) for project monitoring

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G4 partner

The G4 is a group of four countries, Brazil, Germany, India and Japan, that support each other's bids for permanent seats on a reformed UN Security Council. They advocate expansion of both permanent and non-permanent membership and have jointly tabled reform proposals at the UN. For UPSC, the G4 is central to India's UNSC permanent-membership campaign and questions on UN reform.

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Gadgil formula

The Gadgil formula is the 1969 norm, named after Planning Commission deputy chairman D. R. Gadgil and approved by the National Development Council, for sharing plan assistance among states. After meeting special category states, the balance went 60 per cent on population, 25 per cent on per capita income, 7.5 per cent on tax effort and 7.5 per cent for special problems. Later revised as the Gadgil-Mukherjee formula, it is the classic UPSC case of formula-based federal transfers.

Example: The 1991 Gadgil-Mukherjee revision, which added fiscal management as a criterion for plan assistance.

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Gadgil Yojana

Gadgil Yojana is the nickname of the Third Five Year Plan, 1961 to 1966, named after D. R. Gadgil, then deputy chairman of the Planning Commission. It aimed to make India self-reliant, stressing agriculture and wheat alongside steel, chemicals, fuel and power. The wars of 1962 and 1965 and severe droughts held growth to about 2.8 per cent against a 5.6 per cent target, and the plan was followed by the Plan Holiday. For UPSC, it marks the first major planning failure.

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Gadkari revolt

The Gadkari revolt was an 1844 uprising in Kolhapur, Maharashtra, by the Gadkaris, hereditary Maratha fort garrisons. After the Third Anglo-Maratha War their service was dispensed with, their land grants taxed, customary privileges withdrawn and lands placed under mamlatdars, while sweeping revenue reforms during the minority administration bred resentment. The rebels seized hill forts such as Samangarh, Bhudargarh and Panhala before British troops suppressed them. For UPSC it is a standard pre-1857 uprising driven by colonial land revenue policy.

Example: The rebels' capture of the Samangarh and Panhala forts in 1844.

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Gadkaris

Gadkaris were the keepers and garrison commanders of forts (gad) in the Maratha polity under Shivaji and the Peshwas. Each gadkari held charge of a fort's defence, stores and troops, operating within the Maratha system of fort-centred territorial control. They matter for UPSC because forts were the backbone of Maratha military and administrative organisation, and the term frequently appears in questions on Shivaji's administrative and military system.

Example: Shivaji's network of hill forts in the Western Ghats, such as Raigad and Pratapgad, each placed under gadkaris responsible for their defence and upkeep.

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Gaekwad

Gaekwad is the Maratha dynasty that ruled Baroda as a princely state under British paramountcy, founded by Pilaji Rao Gaekwad in the 1720s. Its best-known ruler, Sayajirao Gaekwad III (1875-1939), modernized the state with free primary education, public libraries and social reform, and funded B. R. Ambedkar's studies abroad. Baroda acceded to India in 1949. For UPSC, the Gaekwads illustrate princely-state modernization and royal patronage of social reform.

Example: Sayajirao Gaekwad III's Baroda, the first Indian state to introduce free and compulsory primary education.

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Gaganyaan

Gaganyaan is ISRO's human spaceflight programme, India's first crewed orbital mission. It will use the human-rated LVM3 launcher from Sriharikota to carry up to three astronauts in a crew module to low Earth orbit for about three days. The programme includes uncrewed test flights, the Vyommitra humanoid robot, crew escape system trials and astronaut training. Success would make India the fourth nation with independent human spaceflight. For UPSC it is the flagship of India's space ambitions.

Example: The October 2023 TV-D1 test flight that validated the crew escape system.

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Gaganyaan and Indian space station plans

Gaganyaan and Indian space station plans are ISRO's human-spaceflight programme, aiming to send Indian astronauts to orbit, followed by the Bharatiya Antariksh Station by the mid-2030s. They mark India's entry into crewed spaceflight. They are the essay's horizon for space ambition.

Example: ISRO's crewed Gaganyaan mission and the planned Indian space station.

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Gahadavalas

The Gahadavalas were the early-medieval Rajput dynasty that ruled Kannauj and Varanasi from the late 11th to the late 12th century. Founded by Chandradeva around 1089, its greatest ruler was Govindachandra (c. 1114-1155), and its last king Jaichand died fighting Muhammad Ghori at the Battle of Chandawar in 1194. They matter because their temple patronage and fall mark the close of early-medieval North India, a standard UPSC history theme.

Example: Battle of Chandawar, 1194

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gaja-prishta

Gaja-prishta (gajaprishtha, elephant-back) is the apsidal or elliptical plan and roof form in Indian temple architecture, shaped like the curved back of an elephant. Seen in early Chalukyan and Dravidian work, it produces an oblong sanctum with a curved rear that allows circumambulation. For UPSC (GS-1, art and culture), it is asked in temple-architecture questions distinguishing Nagara, Dravida and Vesara forms.

Example: The Durga temple at Aihole, Karnataka, built by the Chalukyas in the 7th-8th century

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Gajabetekara

Gajabetekara, meaning 'elephant hunter', is the title borne by Deva Raya II (reigned 1422-1446), the greatest ruler of the Sangama dynasty of the Vijayanagara Empire. Recorded in inscriptions, it celebrated his military prowess and victories, metaphorically against enemies 'strong as elephants', and his famed skill in elephant warfare. Under him the empire reached its Sangama zenith, drawing tribute from Sri Lanka while Abdur Razzaq marvelled at its wealth. It is a favourite UPSC prelims question on royal titles.

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Gajraj

Gajraj is an AI-based intrusion detection system developed to prevent elephant deaths in collisions with trains. It uses fibre-optic acoustic sensors laid along railway tracks through elephant corridors, which detect the movement of elephants and trigger alerts to loco pilots and control rooms in time to slow or stop trains.

Example: The Gajraj system has been deployed along elephant corridors in states such as Assam and West Bengal, where train hits are a major cause of elephant mortality.

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Gajraj system

The Gajraj system is a technology toolkit for reducing human-elephant conflict, built around AI-linked fibre-optic sensors that detect elephants approaching railway tracks and warn railway staff in advance. It also includes AI-enabled camera traps that monitor protected areas in real time. Together with wildlife corridors and compensation schemes, it forms India's technology-led response to elephant mortality on rail lines.

Example: Fibre-optic sensors of the Gajraj system alert loco pilots to elephant herds on the tracks, allowing trains to slow down before a collision.

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GalaxEye

GalaxEye is an Indian space-technology startup building Earth-observation satellites that combine synthetic aperture radar (SAR) and optical imaging on a single platform. SAR imaging works through cloud cover and at night, so the fusion gives all-weather, day-and-night observation capability for defence, agriculture, insurance and disaster management applications.

Example: GalaxEye launched its first satellite, Mission Drishti, in May 2026.

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GalaxEye's Mission Drishti

Mission Drishti is GalaxEye's first satellite, launched in May 2026 and billed as the world's first satellite fusing optical and radar imaging on one platform. By carrying both an optical camera and a synthetic aperture radar, it can image the Earth in all weather and lighting conditions.

Example: Mission Drishti demonstrated that an Indian startup-built satellite could combine optical and synthetic aperture radar imaging, enabling surveillance even through cloud cover.

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Galloping or hyperinflation

Galloping inflation is very rapid price rise, often in double or triple digits annually, while hyperinflation is its extreme form where prices explode and money loses its store-of-value function. Hyperinflation is conventionally marked at 50 per cent inflation per month, driven by runaway money printing to finance deficits and collapsing confidence in the currency. Economies escape it through currency reform, dollarization or harsh fiscal stabilization. For UPSC, the ladder from creeping to hyperinflation is classic prelims material.

Example: Zimbabwe in 2008, the textbook modern case of hyperinflation.

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Galwan

Galwan refers to the Galwan Valley in eastern Ladakh, site of the deadly India-China clash of 15-16 June 2020, the first combat fatalities on the Line of Actual Control in 45 years. Twenty Indian soldiers, including Colonel Santosh Babu, died in hand-to-hand fighting after Chinese troops violated disengagement understandings; China later acknowledged its own casualties. The clash triggered standoffs across eastern Ladakh and a reset of bilateral ties. For UPSC it anchors questions on the LAC and India-China relations.

Example: India's June 2020 ban on 59 Chinese apps including TikTok, an immediate response to the clash.

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Gamal Abdel Nasser

Gamal Abdel Nasser was Egypt's president from 1956 to 1970 and a founder of the Non-Aligned Movement. A Free Officers leader who overthrew the monarchy in 1952, he nationalized the Suez Canal in 1956, surviving the Anglo-French-Israeli invasion, and championed pan-Arabism and anti-colonialism. He co-founded the NAM with Nehru, Tito and Sukarno at Belgrade in 1961, placing India at the heart of Third World solidarity. For UPSC he is central to decolonization, Suez and NAM questions.

Example: The 1956 nationalization of the Suez Canal and the ensuing Suez Crisis.

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Gamma Garden

A radiation-breeding facility in which crop plants are exposed to gamma rays, in India's case from a Cobalt-60 source at the Indian Agricultural Research Institute in New Delhi, to induce heritable mutations that breeders then screen for useful traits.

Example: M.S.

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Gana

Gana in ancient India meant an assembly, and by extension the gana-sanghas, republican oligarchies such as the Licchavis of Vaishali and the Shakyas of Kapilavastu. Buddhist and Jain texts describe ganas as bodies where clan chiefs decided matters collectively, in contrast to monarchies like Magadha. They are cited as evidence of republican traditions in ancient India, though power rested with elite lineages rather than the people. For UPSC, ganas anchor questions on ancient polity and the sixteen mahajanapadas.

Example: The Licchavi gana of Vaishali, whose assembly of clan chiefs is described in Buddhist literature.

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gana-sanghas

Gana-sanghas were ancient Indian republican or oligarchic polities in which power rested with an assembly of nobles or clan chiefs rather than a hereditary monarch, prominent in the 6th-4th centuries BCE. Buddhist and Jain texts describe their assemblies, debates and voting procedures. For UPSC (GS-1, ancient history), they represent India's early republican tradition alongside the monarchic mahajanapadas.

Example: The Lichchhavi gana-sangha of Vaishali

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Gandhara

Gandhara was the ancient northwestern region of the subcontinent centred on Taxila and Peshawar (Purushapura), now in Pakistan. It was a celebrated centre of learning whose university at Taxila drew students across Asia, and a crossroads of Indian, Persian and Hellenistic cultures. It matters for UPSC because it anchors questions on Indo-Greek kingdoms, Kushan patronage and the Greco-Buddhist art tradition that flourished there under Kanishka.

Example: Taxila's university, where the grammarian Panini and the statesman Kautilya are traditionally said to have studied.

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Gandhara school

The Gandhara school is the Greco-Buddhist sculptural style that flourished in the northwest between the first and fifth centuries CE, chiefly under the Kushans. It depicts the Buddha and Bodhisattvas with Hellenistic features, such as wavy hair, toga-like drapery and realistic musculature, carved in blue-grey schist. It matters for UPSC because it is the classic contrast pair with the indigenous Mathura school, making the two together a staple Prelims comparison on ancient Indian art.

Example: The standing Buddha images in blue-grey schist from Taxila, shown in Greco-Roman drapery with a halo and ushnisha.

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Gandhi

Gandhi is the honorific for Mohandas Karamchand Gandhi (1869-1948), leader of India's national movement and apostle of non-violence. He forged satyagraha, truth-based non-violent resistance, into a mass political method through campaigns like Non-Cooperation, Civil Disobedience and Quit India, while preaching swadeshi, trusteeship and village self-rule. For UPSC, he anchors GS-1 modern Indian history and GS-4 ethics, where his life is the canonical case study in moral leadership.

Example: The Dandi March of March-April 1930, when Gandhi led the Salt Satyagraha against the British salt tax.

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Gandhi National Rural Employment Guarantee Act

The Gandhi National Rural Employment Guarantee Act is the commonly bolded short form of the Mahatma Gandhi National Rural Employment Guarantee Act, 2005, the world's largest wage-employment programme. It guarantees every rural household up to 100 days of unskilled manual work a year on demand, with unemployment allowance payable if work is not provided. For UPSC, it is the flagship rights-based social protection law.

Example: During the 2020 lockdown, record demand for work under the Act absorbed millions of reverse-migrating workers.

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Gandhi-Irwin Pact

The Gandhi-Irwin Pact, signed on 5 March 1931 and also called the Delhi Pact, was the agreement between Mahatma Gandhi and Viceroy Lord Irwin that ended the Civil Disobedience Movement. The Congress suspended the movement and agreed to attend the Second Round Table Conference, while the government released political prisoners not convicted of violence, remitted fines, and allowed peaceful picketing and salt-making by coastal villagers. For UPSC it is the classic case of negotiated advance and Gandhi's struggle-truce-struggle strategy.

Example: Gandhi's attendance as the sole Congress delegate at the Second Round Table Conference in London in 1931.

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Gandhi's

Gandhi's is a possessive shorthand used in UPSC preparation for anything belonging to Mahatma Gandhi's thought and practice, from satyagraha and ahimsa to swadeshi, trusteeship and Nai Talim. Questions phrased as 'Gandhi's view on...' expect the candidate to recall his positions on non-violence, village self-sufficiency, unity of ends and means, and the constructive programme. The sense matters because Gandhi's ideas thread through modern Indian history, polity and GS-4 ethics answers.

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Gandhi's arrival

Gandhi's arrival refers to Mahatma Gandhi's return to India from South Africa on 9 January 1915, after over two decades of satyagraha there. Welcomed at Bombay, he toured India for a year on Gokhale's advice before entering public life, founding the Sabarmati Ashram and soon leading the Champaran, Kheda and Ahmedabad movements. The date is commemorated as Pravasi Bharatiya Divas, honouring the diaspora. For UPSC it marks the pivot from the moderate-extremist phase to mass Gandhian politics.

Example: His landing at Bombay's Apollo Bunder on 9 January 1915.

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Gandhi’s Nai Talim

Nai Talim, or basic education, was Gandhi's 1937 scheme of learning through productive craft, formulated at Wardha. It proposed free, compulsory schooling in the mother tongue centred on a craft such as spinning, weaving or agriculture, so children learned by doing, the school became partly self-supporting, and education connected with village life and dignity of labour. The Zakir Husain Committee worked out its details. For UPSC, Nai Talim matters for education policy, skill development and Gandhi's constructive programme.

Example: The 1937 Wardha conference where Gandhi placed the Nai Talim scheme before educationists.

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Gandhian Plan

The Gandhian Plan is the 1944 economic programme drawn up by S.N. Agarwal, proposing a decentralised, village-based economy of self-sufficient units. It rejected heavy industrialisation in favour of cottage industries, agriculture and minimum government interference. It matters for UPSC because it sits in the famous set of 1940s Indian plans alongside the Bombay Plan, the People's Plan and the Sarvodaya Plan, and Prelims questions routinely ask which economist authored each plan.

Example: S.N. Agarwal's 1944 'Gandhian Plan of Economic Development for India', which proposed Rs 3,000 crore of investment over ten years through village industries.

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Gandhian principles

Gandhian principles in UPSC usage usually mean the Gandhian strand of the Directive Principles of State Policy: village panchayats (Article 40), cottage industries (Article 43), protection of weaker sections (Article 46), prohibition and public health (Article 47), and agriculture with cow protection (Article 48). They translate Gandhi's ideals of village self-sufficiency, dignity of labour and trusteeship into constitutional goals. Mains answers cite them to show how the Constitution absorbed his constructive programme.

Example: Article 40's direction to the state to organize village panchayats.

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Gandhikas

Gandhikas were perfumers and dealers in scented goods in ancient India, mentioned in Tamil texts as all-purpose merchants supplying perfumed oils, scented powders and flower garlands to urban consumers. The term reflects a thriving trade in aromatics, alongside the science of gandhayukti described in Varahamihira's Brihat Samhita. Their presence in market descriptions shows the sophistication of ancient Indian urban commerce and craft specialization. For UPSC they illustrate trade, guilds and urban life in the early historic period.

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Ganga

The Ganga is India's most sacred river, rising at Gaumukh in Uttarakhand and flowing about 2,525 km through Uttarakhand, Uttar Pradesh, Bihar and West Bengal before entering Bangladesh and reaching the Bay of Bengal. It sustains the densely populated Indo-Gangetic plain, carries immense religious significance, and was declared India's National River in 2008. For UPSC it spans geography, culture, federal water governance and flagship programmes like Namami Gange.

Example: The 2008 declaration of the Ganga as India's National River.

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Ganga Action Plan

The Ganga Action Plan, launched in 1986 under Rajiv Gandhi, was India's first major programme to clean the Ganga by intercepting sewage, building treatment plants and curbing industrial pollution in riverside towns. Phase I covered 25 towns in three states; Phase II extended it to the Yamuna, Gomti and Damodar. With limited results, it was succeeded by Namami Gange. For UPSC it is the baseline case for river pollution and programme evaluation.

Example: Namami Gange, launched in 2014 as its successor flagship for a clean Ganga.

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Ganga Action Plans

The Ganga Action Plans were the Government of India's early programmes to clean the river Ganga. The first Ganga Action Plan was launched in 1986, targeting sewage interception and treatment in major towns along the river, and a second phase later extended coverage to tributaries and other states. Limited results led to successor frameworks, first the National Ganga River Basin Authority in 2009 and then the Namami Gange mission in 2014.

Example: GAP-I (1986) covered 25 Class-I towns in Uttar Pradesh, Bihar and West Bengal, marking India's first major river-cleaning programme.

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Ganga and Yamuna

The Ganga and Yamuna are the two great rivers of north India whose confluence at Prayagraj, the Triveni Sangam with the mythical Saraswati, is among Hinduism's holiest sites and the venue of the Kumbh Mela. The Yamuna, the Ganga's largest tributary, rises at Yamunotri and joins it after about 1,376 km. Together they define the Ganga-Yamuna doab, the historic heartland of Indian civilization. For UPSC they link physical geography with culture and the Kumbh.

Example: The Prayagraj Kumbh Mela at the Triveni Sangam, inscribed by UNESCO as Intangible Cultural Heritage in 2017.

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Ganga river basin

The Ganga river basin is India's largest river basin, draining about 861,452 sq km within India, roughly a quarter of the country's land area, across eleven states from Uttarakhand to West Bengal, with parts in Nepal and Bangladesh. It holds the world's most fertile alluvium and supports one of the densest population concentrations on earth, making it the core of India's food security. Its management, from Namami Gange to inter-state sharing, is central to UPSC geography and environment answers.

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Ganga Waters Treaty

The Ganga Waters Treaty is the 1996 India-Bangladesh agreement on sharing the Ganga's waters at Farakka, signed by Prime Ministers H. D. Deve Gowda and Sheikh Hasina on 12 December 1996. It fixed a 30-year formula for dividing dry-season flows, replacing ad hoc memoranda and removing a major irritant in bilateral ties. Its expiry in 2026 makes renewal a live issue. For UPSC it is the model case of transboundary water sharing with a lower riparian.

Example: The treaty's 30-year tenure running out in December 2026, putting renewal on the bilateral agenda.

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Ganga-Yamuna doab

The Ganga-Yamuna doab is the fertile alluvial plain between the Ganga and the Yamuna, stretching across western Uttar Pradesh and parts of Uttarakhand, Haryana and Delhi. Doab, from Persian 'do' (two) and 'ab' (water), means the land between two rivers. Enriched by annual silt deposits, it became the granary of north India and the stage of empires from the Kurus to the Mughals and the 1857 uprising. For UPSC it is the textbook landform linking rivers, agriculture and history.

Example: Meerut and Delhi, the 1857 uprising's epicentres, both lying in the doab.

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Ganga–Yamuna doab

The Ganga-Yamuna doab is the interfluvial plain between the Ganga and Yamuna rivers in western Uttar Pradesh, among the most fertile tracts of the Indo-Gangetic plain. Built by Himalayan silt, it supported dense settlement from the Harappan and Vedic periods through the Delhi Sultanate and Mughals, and its rich revenue made it the prize of north Indian empires. For UPSC it connects geomorphology with the political history of the Gangetic heartland.

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Gangadevi

Gangadevi was the 14th-century Sanskrit poetess who composed the Madhuravijayam, an epic celebrating her husband Kumara Kampana's Vijayanagara campaign that ended the Madurai Sultanate around 1370. A princess and scholar herself, her poem is both literature and a key historical source for the early Vijayanagara expansion into the Tamil country. For UPSC she exemplifies women's literary contribution in medieval India and the use of court poetry as historical evidence.

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Gangaikonda

Gangaikonda, short for Gangaikondacholapuram, 'the town of the Chola who conquered the Ganga', was the imperial capital founded by Rajendra Chola I around 1025 CE after his victorious expedition to the Ganga valley. Built to commemorate the northern campaign, it replaced Thanjavur as the Chola capital and centred on the great Brihadeeswarar temple and the Cholagangam tank. For UPSC it marks the peak of Chola power and a South Indian empire projecting force into the north.

Example: Rajendra I's Ganga expedition of c. 1022, which brought Ganga water for the new capital's Cholagangam tank.

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Gangaikonda Cholisvaram

The Gangaikonda Cholisvaram is the Brihadeeswarar temple at Gangaikondacholapuram, Tamil Nadu, built by Rajendra Chola I to commemorate his Ganga expedition. A masterpiece of Chola architecture with its soaring vimana and exquisite sculpture, it forms part of the UNESCO World Heritage 'Great Living Chola Temples' alongside Thanjavur and Darasuram. For UPSC it is the key monument of Rajendra's reign and of Chola art and statecraft.

Example: Its inscription in the UNESCO World Heritage List in 2004 as part of the Great Living Chola Temples.

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Gangaikondacholapuram

Gangaikondacholapuram is the Chola capital founded by Rajendra I around 1025 CE after his victorious expedition to the Ganga valley, the name meaning the city of the Chola who conquered the Ganga. Its Brihadeeswara temple, with a curvilinear vimana and rich sculpture, rivals the Thanjavur great temple. It matters for UPSC because it exemplifies Chola imperial architecture and administration and is part of the UNESCO Great Living Chola Temples listing.

Example: The Brihadeeswara temple at Gangaikondacholapuram, whose Nandi mandapa and massive lingam mark the zenith of Chola temple building.

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Ganges

Ganges is the English name for the Ganga, India's national river, used in colonial records, international treaties and older literature. UPSC aspirants meet it in historical sources such as the Ganges Canal of 1854, and in the 1996 India-Bangladesh treaty formally titled on sharing of the 'Ganga/Ganges' waters. Knowing both names matters because questions and source passages use them interchangeably.

Example: The Ganges Canal of 1854, one of colonial India's largest irrigation works, built under Proby Cautley.

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Gangetic dolphin

The Gangetic dolphin (Platanista gangetica) is a freshwater dolphin found in the Ganga-Brahmaputra-Meghna river system, and it was declared India's National Aquatic Animal in 2010. It is listed as Endangered on the IUCN Red List and serves as an indicator species for river health, being threatened by dams, barrages, pollution, sand mining and accidental entanglement in fishing nets.

Example: Project Dolphin, announced in 2020, focuses on the conservation of the Gangetic dolphin and other riverine and marine dolphins.

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ganimi kava

Ganimi kava (from Persian, roughly the enemy's tactics) is the guerrilla warfare method pioneered by Chhatrapati Shivaji Maharaj in the 17th century: swift cavalry raids, hit-and-run attacks, night assaults, use of intelligence and exploitation of the Sahyadri terrain, avoiding pitched battles with larger Mughal and Adil Shahi armies. For UPSC (GS-1, medieval history), it is central to Maratha military history and administration.

Example: The Battle of Pratapgad in 1659, where Shivaji defeated Afzal Khan

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Ganweriwala

Ganweriwala is a major Indus Valley Civilization site in the Cholistan Desert of Punjab, Pakistan, on the dry bed of the Ghaggar-Hakra. Spread over about 80 hectares, it rivals Mohenjo-daro in size and sits equidistant between Harappa and Mohenjo-daro, suggesting a fifth great urban centre, yet it has never been properly excavated. Surveyed by M. R. Mughal in the 1970s, it yielded typical Harappan artefacts. For UPSC it is the classic 'unexcavated giant' of Harappan geography.

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Gaps

In the context of land restoration, 'gaps' refers to the implementation gaps that hold back India's efforts to meet land-degradation neutrality targets: fragmented mandates across agencies, weak monitoring of outcomes, insecure land tenure, missing private finance, and restoration efforts reduced to monoculture plantations rather than ecological recovery.

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Garba

Garba is Gujarat's traditional folk dance, performed in concentric circles around a lit lamp or an image of the goddess during the nine nights of Navratri. The word derives from Sanskrit garbha (womb), symbolizing the cycle of life, and the dance honours Shakti, the divine feminine. Danced in chaniya choli and kediyu to dhol and folk songs, it is among India's most recognizable folk traditions. For UPSC it is the go-to example of Gujarat's culture and living intangible heritage.

Example: The December 2023 UNESCO inscription of 'Garba of Gujarat' as Intangible Cultural Heritage of Humanity.

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Garba of Gujarat

Garba of Gujarat is the UNESCO title under which Gujarat's Navratri dance was inscribed on the Representative List of the Intangible Cultural Heritage of Humanity on 6 December 2023, at the 18th session in Kasane, Botswana. It became India's 15th element on the list, recognized as a ritualistic, devotional dance honouring the feminine energy that fosters social and gender inclusivity. For UPSC prelims, the year, place and '15th element' fact are directly testable.

Example: The 6 December 2023 inscription at Kasane, Botswana, during UNESCO's 18th ICH committee session.

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garbhagriha

The garbhagriha is the sanctum sanctorum of a Hindu temple, the small, dark inner chamber housing the principal deity's image or symbol, entered through a single doorway. It is the ritual heart of the temple, crowned externally by the shikhara or vimana. It is essential vocabulary for GS-1 art and culture questions on temple architecture across the Nagara, Dravida, and Vesara styles.

Example: The garbhagriha of the Brihadeshvara temple at Thanjavur, which houses a massive Shiva linga beneath its towering vimana.

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Garibi Hatao

Garibi Hatao (Remove Poverty) was the campaign slogan of Indira Gandhi's Congress in the 1971 general election, promising to attack poverty directly rather than rely on growth alone. The slogan swept the party to a landslide victory. For UPSC, Garibi Hatao marks the turn toward a statist, redistributive economic policy, bank nationalisation, and the poverty-eradication rhetoric that defined the 1970s.

Example: The slogan powered Indira Gandhi's landslide victory in the 1971 Lok Sabha election, fought after the Congress split of 1969.

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Garima Greh

Garima Greh are shelter homes for transgender persons run by the Ministry of Social Justice and Empowerment with community-based organizations. Launched with the first home in Vadodara in November 2020, they provide free shelter, food, medical care, counselling, skill development and recreational facilities, supporting the Transgender Persons (Protection of Rights) Act, 2019. For UPSC they are the flagship example of welfare policy for transgender persons and of inclusive governance.

Example: The first Garima Greh e-inaugurated at Vadodara, Gujarat, on 25 November 2020.

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Garima Grehs

Garima Grehs are shelter homes for destitute and abandoned transgender persons run under the SMILE umbrella scheme of the Ministry of Social Justice and Empowerment. They provide food, housing, medical care, counselling, skill training and legal aid, with the stated goal of mainstreaming residents into dignified livelihoods. For UPSC, they are the housing pillar of transgender welfare after the Transgender Persons (Protection of Rights) Act, 2019.

Example: By 2025-26 about eighteen Garima Grehs were supported across fifteen states and UTs, housing over 400 residents.

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Gas hydrates

ice-like crystalline deposits of methane trapped in water molecules under high pressure and low temperature on the seabed, sometimes called flammable ice; a potential future energy source.

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Gatha Saptashati

The Gatha Saptashati, 'seven hundred verses', is a Prakrit anthology of 700 short love poems traditionally ascribed to the Satavahana king Hala of the 1st century CE. Its gathas capture rural life, longing and the monsoon landscape of the Deccan in vivid miniature, and the collection became a model for later kavya and for Prakrit literature's prestige alongside Sanskrit. For UPSC it is the representative text of Satavahana culture and of Prakrit as a literary language.

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Gather the facts

In UPSC ethics and governance answers, 'gather the facts' is the first step of sound decision-making: collecting verified information before judging a case or framing policy. It echoes the administrative principle that good decisions rest on evidence, stakeholder views and data rather than assumptions, and it routinely opens model answers on case studies, from disaster response to ethical dilemmas. The phrase signals objectivity, a core civil services value.

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GATS

GATS is the General Agreement on Trade in Services, the WTO treaty that extended multilateral trade rules from goods to services from 1995. It works through four modes of supply, namely cross-border supply, consumption abroad, commercial presence and the movement of natural persons. It matters for UPSC because India's strengths in IT, business process outsourcing and professional mobility make services liberalisation, especially Mode 4, a central theme in India's WTO negotiations and trade diplomacy.

Example: India's dispute at the WTO over the United States' H-1B visa fee hikes, framed as a Mode 4 (movement of natural persons) services trade issue.

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GATS Mode 4

GATS Mode 4 is one of the four modes of services trade under the WTO's General Agreement on Trade in Services, covering the temporary movement of natural persons across borders to supply services, such as IT professionals, consultants and nurses working abroad. It is India's key offensive interest in services negotiations. For UPSC, Mode 4 is central to questions on WTO services talks and India's demand for easier movement of professionals.

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GATT

GATT is the General Agreement on Tariffs and Trade, the 1948 multilateral framework that governed world trade in goods before the WTO. It rested on the most-favoured-nation principle, national treatment and negotiated tariff rounds, beginning with 23 signatories at Geneva. It matters for UPSC because its eight trade rounds built the architecture of modern trade liberalisation, and its Uruguay Round (1986-1994) directly created the WTO in 1995, marking the shift from a provisional agreement to a full trade organisation.

Example: The Uruguay Round of GATT, concluded in 1994, which established the WTO and brought services and intellectual property into the multilateral trading system.

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Gaudiya Vaishnavism

Gaudiya Vaishnavism is the Vaishnava devotional tradition founded by Chaitanya Mahaprabhu in early 16th-century Bengal, centred on loving devotion (bhakti) to Krishna expressed through congregational chanting (sankirtana) and kirtan. It holds that chanting the divine name is the simplest path to liberation in Kali Yuga. For UPSC, it is key to GS-1 medieval bhakti-movement answers, with its spread into Manipur and Odisha relevant for art-culture questions.

Example: The spread of the movement to Manipur, where it became the state religion and shaped the Manipuri Raslila dance tradition.

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Gaulmika

A gaulmika was an ancient Indian military officer, the commander of a 'gulma' (a small military unit), attested in early Indian administrative vocabulary alongside terms like kataka (military camp). Under the Satavahanas, the Myakadoni inscription records gaulmikas as special officers posted at border areas, blending frontier administration with military command. For UPSC, it is a staple ancient-history term testing the difference between civil and military officials.

Example: The Myakadoni inscription, which records gaulmikas as special officers at border areas under Satavahana rule.

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Gaura Devi

Gaura Devi was the Chipko activist who, in March 1974 at Reni village in Chamoli, led a group of village women in hugging trees to stop a contractor's loggers. Her stand, made famous by the slogan about forests being a living resource (maika, not just wood), turned Chipko into a nationwide movement. She matters for UPSC because the Chipko movement is the canonical example of grassroots environmentalism and women's agency, cited in questions on environmental movements and sustainable development.

Example: The Reni forest confrontation of 26 March 1974, when Gaura Devi and fellow women physically blocked the logging contractor's men.

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Gautami Balashri

Gautami Balashri was the mother of the Satavahana king Gautamiputra Satakarni, known through her famous Nasik cave inscription (the Nasik prasasti) composed after his death. The inscription eulogises her son as the destroyer of Shakas, Yavanas and Pahlavas and the restorer of Satavahana glory. For UPSC, it is a key primary source for Satavahana political history and a rare early voice of a queen mother in epigraphy.

Example: Her Nasik inscription describing Gautamiputra Satakarni as the conqueror who uprooted the Kshaharata (Nahapana) dominion.

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Gautamiputra

Gautamiputra is short for Gautamiputra Satakarni, the most powerful Satavahana king, ruling roughly the late 1st to early 2nd century CE from Pratishthana (Paithan). He defeated the Western Kshatrapa Nahapana, re-struck his coins, and revived Satavahana power across the Deccan. For UPSC, he is central to GS-1 post-Mauryan Deccan history, illustrating Indo-foreign conflict and coinage as historical evidence.

Example: His coins overstruck on Nahapana's issues, proclaiming the restoration of Satavahana rule in the Deccan.

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Gautamiputra Satakarni

Gautamiputra Satakarni was the Satavahana king (roughly 106 to 130 CE) celebrated in the Nasik prashasti, composed by his mother Gautami Balashri, as the destroyer of the Shakas, Yavanas and Pahlavas and the restorer of Satavahana glory. His coins and inscriptions attest to a wide Deccan empire and revival of Vedic rites. He matters for UPSC because the Nasik prashasti is a key primary source on Satavahana polity, and he anchors questions on Deccan dynasties and Shaka-Satavahana conflict.

Example: The Nasik cave inscription of Gautami Balashri, which calls him 'the one whose horses drank the waters of the three oceans'.

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Gavishti

Gavishti is a Vedic Sanskrit term for battle, literally 'the desire for cows'. In the Rigvedic pastoral economy, raids and battles were fought to seize cattle, the chief measure of wealth, so the very word for war carried this root. For UPSC, it is a favourite GS-1 marker of the early Vedic economy and polity, showing how cattle-wealth shaped tribal conflict.

Example: The Rigveda's use of gavishti for battles fought between tribes over cattle herds.

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Gayatri mantra

The Gayatri mantra is the most revered Vedic hymn, Rigveda III.62.10 addressed to Savitr (the sun god), meditating on the divine light that illumines the intellect. It forms the core of the daily sandhya prayers and the upanayana (sacred thread) initiation, traditionally chanted at dawn and dusk. For UPSC, it is a standard GS-1 Vedic-culture point linking religion, rites of passage, and Sanskrit literary heritage.

Example: Its recitation during the upanayana ceremony, marking a boy's initiation into Vedic study.

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GCC

The Gulf Cooperation Council (GCC) is a regional organization of six Arab Gulf states, Saudi Arabia, the UAE, Qatar, Kuwait, Oman and Bahrain, founded in 1981. It coordinates economic, security and political policies and is a major source of India's energy imports and remittances from the Indian diaspora. For UPSC, the GCC is central to India's West Asia policy and to energy-security, diaspora and trade questions.

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GDP

GDP is the gross domestic product, the total market value of all final goods and services produced within a country's borders in a given period. It is computed by three approaches, namely the value-added, income and expenditure methods. It matters for UPSC because it is the headline measure of economic size and growth used in India (with 2011-12 as the current base year), while questions increasingly probe its limits as a welfare measure, such as its silence on inequality, unpaid work and environmental costs.

Example: India's national accounts use 2011-12 as the base year for real GDP, with a proposed shift to 2022-23 as the new base year released in February 2026.

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GDP (market price)

GDP at market price is the total value of final goods and services produced within a country, measured at the prices buyers actually pay, which include indirect taxes and exclude subsidies. It differs from GDP at factor cost, which values output at production cost to producers. For UPSC, the market-price versus factor-cost distinction is a standard national-income accounting question in economics.

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GDP at factor cost

GDP at factor cost measures the total value of final goods and services produced in a country valued at the cost of the factors of production, that is, excluding indirect taxes and including subsidies. It reflects what producers actually receive for their output. It relates to GDP at market price by the identity: market price equals factor cost plus net indirect taxes. For UPSC, factor cost is a staple concept in national income accounting.

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GDP base year of 2011-12

The 2011-12 base year was the reference year India used for national accounts from the 2015 revision, replacing 2004-05, to compute GDP at constant prices. Rebasing updates the weights to reflect structural changes in the economy. In February 2026, MoSPI moved to a new 2022-23 base series. For UPSC, base-year revision is a recurring question on the measurement of growth and the comparability of GDP data.

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GDP deflator

The GDP deflator is the ratio of nominal GDP to real GDP, expressed as an index, and it is the broadest measure of price change in an economy. Unlike the CPI or WPI, which track fixed baskets of goods, it covers every good and service produced, so it captures inflation economy-wide. It matters for UPSC because Prelims questions often contrast it with CPI and WPI as inflation measures, and because it implicitly measures how much of GDP growth is real versus price-driven.

Example: The Economic Survey routinely reports GDP growth alongside the implicit deflator to separate real output growth from inflation in a given year.

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Geertz's primordialism

Geertz's primordialism is anthropologist Clifford Geertz's theory that ethnic and communal identities rest on 'primordial attachments' (kinship, language, custom, religion) felt as given and deeply binding, not merely chosen. In his 1963 essay he argued these attachments drive politics in new states, often overwhelming civic nationalism. For UPSC, it grounds GS-1 sociology answers and GS-2 analysis of communalism, regionalism and identity politics.

Example: The persistence of linguistic and religious identities in Indian electoral politics despite civic-nationalist ideals.

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GEMCOVAC-OM

GEMCOVAC-OM is India's first Omicron-specific mRNA booster vaccine against COVID-19, developed by Pune-based Gennova Biopharmaceuticals with support from the Department of Biotechnology and BIRAC under Mission COVID Suraksha. It is thermostable, remaining stable at 2 to 8 degrees Celsius, so it avoids the ultra-cold chain that other mRNA vaccines need, and it is delivered intradermally through a needle-free device. It received emergency use authorisation from the Drugs Controller General of India.

Example: It was granted emergency use authorisation as a booster for adults aged 18 and above who had completed primary vaccination with Covishield or Covaxin.

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Gender

Gender is the socially constructed set of roles, expectations and behaviours assigned to men, women and other genders, distinct from biological sex. UPSC frames it as an analytical lens across the syllabus: sex ratios and health in GS-1, gender budgeting and women's empowerment in GS-2, the gendered division of labour in GS-3, and gender justice in GS-4 ethics. It anchors answers on SDG-5, women's SHGs and political reservation.

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Gender Budget Statement (Statement 13)

The Gender Budget Statement is Statement 13 of the Union Budget's Expenditure Profile, consolidating all Union government expenditure benefiting women and girls. It is presented in three parts: Part A for 100 percent women-specific schemes, Part B for schemes where 30 to 99 percent of allocation benefits women, and Part C for allocations up to 30 percent. For UPSC, it is the flagship evidence for GS-2 answers on gender budgeting and fiscal accountability.

Example: In BE 2025-26 the gender budget rose to about Rs 4.49 lakh crore, roughly 8.86 percent of total Union expenditure, as reported to Parliament.

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Gender budgeting

Gender budgeting is the fiscal practice of analysing government budgets for their differential impact on women and men and reshaping allocations to close gender gaps. India adopted it formally in 2005-06, and ministries now report gender-disaggregated expenditure. For UPSC, it is a core GS-2/GS-3 governance tool linking public finance to empowerment outcomes, often asked alongside the Gender Budget Statement and women's welfare schemes.

Example: India's Gender Budget Statement, published annually since 2005-06 as Statement 13 of the Expenditure Profile.

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gender dimension

Gender dimension is the recognition that a policy, event or phenomenon affects women and men differently because of social roles and structural inequalities, requiring disaggregated analysis rather than gender-neutral assumptions. In UPSC answers it is the standard lens for GS-1 questions on women and society, and it extends into GS-2 (health, education, governance) and GS-3 (labour, agriculture) wherever outcomes differ by gender.

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Gender equality

Gender equality is the principle that women, men and people of all genders enjoy equal rights, opportunities and treatment in law, economy and public life. In India it rests on Articles 14, 15 and 16, on affirmative measures like reservation in panchayats, and on schemes for education and work. For UPSC, it anchors GS-2 answers on fundamental rights, women's empowerment and India's commitments under SDG-5.

Example: The 73rd and 74th Constitutional Amendments reserving one-third of panchayat and municipal seats for women.

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Gender equity

Gender equity is the principle of fair, needs-based treatment that recognises different starting positions of genders and provides differentiated support to reach equal outcomes. It differs from equality, which treats everyone identically; equity justifies measures like maternity benefits, girls' hostels and targeted scholarships. For UPSC, the equality-versus-equity distinction is a standard GS-2 and GS-4 ethics framing device for affirmative-action answers.

Example: The Beti Bachao Beti Padhao scheme's targeted interventions in districts with adverse child sex ratios.

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gender mainstreaming

Gender mainstreaming is the strategy of assessing the implications for women and men of every planned action, law, policy or programme, so that women's and men's concerns become integral to design, implementation, monitoring and evaluation. Endorsed by the UN Economic and Social Council in 1997, it moved beyond women-only projects to make gender a cross-cutting concern. For UPSC (GS-1/GS-2), it is the standard framework for questions on women and development.

Example: The Beijing Platform for Action, 1995

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gene

A segment of DNA that carries the instructions for making a functional product, usually a protein and sometimes a functional RNA molecule. Genes are the basic units of heredity, passed from parents to offspring, and their variants (alleles) account for inherited differences between individuals. Gene expression, which genes are switched on or off in each cell, is what makes a root cell different from a leaf cell despite identical DNA.

Example: The cry genes from the bacterium Bacillus thuringiensis, inserted into Bt cotton, produce a protein toxic to bollworm pests and sharply reduced pesticide use in India.

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gene drive

A gene drive is a genetic system engineered to spread a chosen set of genes rapidly through a wild population by biasing inheritance so that nearly all offspring carry the trait. Researchers propose gene drives to suppress malaria-transmitting mosquitoes; ecologists warn that an accidental release could be irreversible.

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Gene editing

Gene editing is the precise modification of an organism's DNA at targeted locations using molecular tools such as CRISPR-Cas9, TALENs and zinc-finger nucleases. Unlike older genetic engineering, which inserts foreign DNA more randomly, gene editing can add, remove or replace specific DNA sequences with high precision, and it is used in medicine, crop improvement and research.

Example: Casgevy, the first CRISPR-based therapy approved in 2023, treats sickle cell disease and transfusion-dependent beta thalassaemia by editing the patient's own blood stem cells.

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gene gun

A gene gun is a device used in plant genetic engineering that fires microscopic heavy-metal particles coated with a gene of interest into plant cells with mechanical force, where the gene integrates into the genome.

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Gene silencing

Gene silencing is a technique that switches off or reduces the expression of a specific gene without changing the DNA sequence, most commonly through RNA interference (RNAi). It is a standard research tool for studying gene function and is also used in crop improvement to suppress genes linked to pests, diseases or undesirable traits.

Example: RNA interference-based gene silencing is used in some crop varieties to suppress specific pest genes, reducing damage without chemical pesticides.

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Gene therapy

Gene therapy is a medical treatment that introduces, replaces or repairs genes in a patient's cells to treat or prevent disease, typically using a modified virus as a delivery vector. It is used mainly for inherited genetic disorders where a faulty gene can be corrected or compensated with a working copy.

Example: Luxturna, a gene therapy for an inherited retinal disorder, delivers a working copy of the RPE65 gene to restore vision.

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General Assembly

The General Assembly is the main deliberative and policymaking organ of the United Nations, in which all 193 member states sit with one vote each. It passes non-binding resolutions, approves the UN budget, admits new members and elects members of other organs, meeting in annual session each September. It matters for UPSC because its resolutions, voting patterns and special sessions are the standard entry point for questions on global governance, and India's positions there reflect its multilateral diplomacy.

Example: The annual UNGA general debate each September, opened by the Secretary-General's report and addressed by heads of state including India's leadership.

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general price level

General price level is the average of the prices of goods and services across an economy, the inverse of the purchasing power of money. It is measured through indices such as the Consumer Price Index, the Wholesale Price Index and the GDP deflator; a sustained rise is inflation and a sustained fall is deflation. For UPSC (GS-3, economy), it anchors questions on inflation measurement, monetary policy and the RBI's inflation-targeting framework.

Example: India's headline retail inflation measured by the CPI (Combined) published by the National Statistics Office

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General Sam Manekshaw

Field Marshal Sam Manekshaw (1914-2008) was India's first Field Marshal and the architect of the 1971 victory that created Bangladesh. As Army Chief he insisted on delaying operations until forces were ready after the monsoon, then directed a swift 13-day campaign. For UPSC, he exemplifies GS-4 military leadership and features in GS-1/GS-3 questions on the 1971 war.

Example: His direction of the December 1971 campaign that forced the surrender of about 93,000 Pakistani troops at Dhaka.

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General Security of Military Information Agreement

GSOMIA is the 2002 India-United States agreement on protecting classified military information shared between the two countries. It created the legal framework for exchanging sensitive defence data and was the first of the four US 'foundational agreements', later followed by LEMOA, COMCASA and BECA. For UPSC, it is the starting point of GS-2 answers on the trajectory of India-US defence cooperation.

Example: Its signing in 2002, which enabled classified information sharing ahead of the later logistics and communications pacts.

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General Service Enlistment Act

The General Service Enlistment Act of 1856, passed under Lord Canning, required Bengal Army sepoys to serve anywhere, including overseas across the 'kala pani', ending their earlier exemption from foreign service. High-caste sepoys saw sea voyages as a threat to caste and religion, and the Act became a major grievance feeding the 1857 revolt. For UPSC, it is a standard GS-1 cause of the Revolt, alongside the greased cartridges and annexation policies.

Example: Its application to the Bengal Army, whose sepoys had traditionally been recruited with exemption from overseas deployment.

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general strike

General strike is a simultaneous work stoppage by workers across many industries or a whole economy, used as a mass weapon of labour protest. It demands high union coordination and can paralyse national life, which is why governments respond with severe repression or major concessions. For UPSC (GS-1/GS-3), it illustrates labour movements, trade unions and industrial relations in modern Indian history.

Example: The 1974 All-India Railway Strike, led by George Fernandes from 8 to 27 May 1974 with about 1.7 million railway workers

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general theory of relativity

Albert Einstein's 1915 theory of gravitation, which describes gravity not as a force but as the curvature of spacetime caused by mass and energy. Massive objects warp the four-dimensional fabric of spacetime, and other objects follow the straightest possible paths through this curved geometry. The theory predicted phenomena later confirmed, including the bending of starlight by the sun, gravitational time dilation and gravitational waves.

Example: GPS satellites must correct for general relativity: their clocks tick faster in Earth's weaker gravity than clocks on the ground, and without the correction navigation would drift by kilometres per day.

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general will

General will is Jean-Jacques Rousseau's concept from The Social Contract (1762): the collective will of a political community aimed at the common good, distinct from the mere sum of private interests, and the source of legitimate sovereignty. Rulers and laws are legitimate only insofar as they express it. For UPSC (GS-1, world history; GS-2, political theory), it underpins debates on popular sovereignty and democratic legitimacy.

Example: Its influence on the ideology of the French Revolution of 1789

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Generalized System of Preferences

The Generalized System of Preferences is the US trade scheme granting duty-free access to developing-country exports to promote their growth, operating since 1976 under UNCTAD's framework. India was its largest beneficiary until the US withdrew India's GSP status in June 2019 over market-access disputes, affecting exports like textiles and engineering goods. For UPSC, it is a staple GS-2/GS-3 example in India-US trade and WTO-related questions.

Example: The US termination of India's GSP benefits in June 2019, citing inadequate market access for American goods.

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Generate the options and evaluate each for every stakeholder

This phrase is a step in the structured method for answering UPSC GS-4 ethics case studies: after identifying stakeholders and the ethical dilemma, the candidate lists all feasible courses of action and tests each against every stakeholder's interests and ethical principles. For UPSC, showing this step demonstrates analytical rigour and earns marks for balanced, consequence-aware reasoning rather than a single impulsive recommendation.

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Generative Adversarial Networks (GANs)

Generative Adversarial Networks (GANs) are a class of machine learning models in which two neural networks, a generator and a discriminator, are trained against each other: the generator creates synthetic data while the discriminator tries to distinguish it from real data. This adversarial training produces highly realistic synthetic images, videos and audio, but it also underlies deepfake content and misinformation risks.

Example: GANs power realistic synthetic face generation, which has raised deepfake concerns during elections and on social media.

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generative AI

Generative AI is artificial intelligence that produces new content, text, images, audio or video, from patterns learned across vast training data; it powers chatbots like ChatGPT and image generators. For governance it cuts both ways: it can draft, translate and summarise public services at scale, yet enables deepfakes, misinformation and copyright disputes. India regulates it through the IT Act, the DPDP Act, 2023 and IT Rules rather than a dedicated AI statute, a live UPSC debate.

Example: ChatGPT-style chatbots for citizen services on one side, and AI-generated deepfake videos in election campaigns on the other.

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genetic diversity

The variety of genes and their combinations within a single species, reflected in differences between individuals and populations. It is the raw material of evolution, giving species the capacity to adapt to diseases, pests and changing climates, and it underpins crop breeding and conservation. Loss of genetic diversity, through monoculture or habitat loss, makes populations vulnerable to a single shock wiping them out.

Example: India's thousands of traditional rice landraces, each carrying genes for drought, flood or salinity tolerance, are a reservoir of genetic diversity for breeding climate-resilient varieties.

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Genetic engineering

Genetic engineering is the direct manipulation of an organism's genes using recombinant DNA technology, most often by inserting a foreign gene to create a transgenic organism with a desired trait. It differs from conventional breeding by crossing species barriers in a single step rather than over many generations of selection.

Example: Bt cotton, engineered with genes from the bacterium Bacillus thuringiensis, produces its own insecticidal protein against bollworms and is India's only commercially approved GM crop.

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Genetic Engineering Appraisal Committee (GEAC)

The Genetic Engineering Appraisal Committee (GEAC) is the apex statutory body under the Environment (Protection) Act, 1986, functioning under the Ministry of Environment, Forest and Climate Change. It appraises and approves activities involving genetically modified organisms, including field trials, environmental release and import or export of GM material. It was earlier called the Genetic Engineering Approval Committee and was renamed in 2010.

Example: GEAC cleared Bt brinjal for environmental release in 2009, after which the government placed it under a moratorium in 2010.

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genetic, species, and ecosystem

The three hierarchical levels at which biodiversity is measured and conserved, as recognised by the Convention on Biological Diversity. Genetic diversity is variation within species; species diversity is the variety of species in an area; ecosystem diversity is the variety of habitats, communities and ecological processes, from coral reefs to alpine meadows. Conservation policy must address all three levels, since protecting species without their habitats, or habitats without genetic variation, is incomplete.

Example: India, one of the world's 17 megadiverse countries, conserves biodiversity at all three levels: gene banks for crop diversity, Project Tiger for species, and biosphere reserves for whole ecosystems.

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Geneva Accords (1954)

The Geneva Accords of 1954 are the settlement that ended the First Indochina War after Dien Bien Phu, partitioning Vietnam at the 17th parallel pending elections that were never held. The partition hardened into the Vietnam War.

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Genghis Khan

Genghis Khan (c. 1162-1227), born Temujin, was the Mongol chieftain who unified the steppe tribes in 1206 and built history's largest contiguous land empire, from China to Eastern Europe. His campaigns reshaped Eurasian trade, and Mongol pressure indirectly shaped Delhi Sultanate politics, as seen in Iltutmish's diplomacy. For UPSC, he anchors GS-1 medieval world-history answers and questions on Central Asian invasions.

Example: The Mongol sack of Baghdad in 1258 under his grandson Hulagu, which ended the Abbasid Caliphate.

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genome

The genome is the complete set of genetic instructions carried by an organism, consisting of all its DNA (in humans, about 3 billion base pairs organised into 23 pairs of chromosomes). It includes both the protein-coding genes and the regulatory regions that control how those genes are switched on and off. Reading genomes helps scientists trace evolution, diagnose inherited diseases, and guide breeding or medical therapy.

Example: The Human Genome Project, completed in 2003, produced the first full reference sequence of the human genome.

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Genome India Project

The Genome India Project is a Department of Biotechnology initiative launched in 2020 to sequence 10,000 genomes representing India's diverse populations. It aims to build a reference database of Indian genetic variation to support precision medicine, disease prediction and targeted drug development.

Example: The project sequences 10,000 genomes from diverse Indian populations to map genetic variants linked to diseases common in India.

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Genome sequencing

Genome sequencing is the process of determining the complete DNA sequence of an organism's genome, including the order of its billions of nucleotide bases. It underpins precision medicine, disease surveillance and biodiversity research, and its cost has fallen dramatically since the Human Genome Project.

Example: India's INSACOG network used genome sequencing to track SARS-CoV-2 variants such as Omicron during the pandemic.

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Genuine Progress Indicator

The Genuine Progress Indicator is an alternative to GDP that adjusts economic output for social and environmental costs and benefits, adding unpaid household work while subtracting pollution, crime and resource depletion. Proposed by Redefining Progress in 1995, it typically grows slower than GDP, exposing growth that is not welfare-enhancing. For UPSC, it is a standard GS-3 citation in answers on sustainable development and the limits of GDP.

Example: Studies showing GPI stagnating in several advanced economies even as their GDP kept rising.

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Genuinely independent boards

Genuinely independent boards are company boards where independent directors are free from material ties to promoters or management and can exercise objective judgment. Indian company law and SEBI's listing norms mandate independent directors and board committees to curb promoter dominance, though true independence remains debated. For UPSC, the concept appears in GS-3 corporate-governance and GS-4 ethics answers on private-sector accountability.

Example: The SEBI requirement that listed companies maintain a minimum proportion of independent directors on their boards.

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geo-12

geo-12 is a fragmentary reference code, most likely a serial number (item 12) from a geography keyterms or study-notes list, and not a standalone concept. Because numbering differs across sources, it cannot be resolved to a unique term without its original list. In some NCERT-based study series, Geo 12 also labels Class 12 human-geography content. For UPSC, such codes are internal indexing, not syllabus concepts.

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geo-targeted SMS alerts

Geo-targeted SMS alerts are emergency text messages sent only to mobile phones in the threatened area, using location-based SMS.

Example: IMD's cyclone warnings reach only coastal districts through geo-targeted SMS

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Geographical

Geographical is the adjective describing anything relating to physical space, location, terrain and climate. In UPSC usage it signals the spatial dimension of a question, from the geographical extent of the Mauryan empire to the geographical factors behind monsoon variability or industrial location. Candidates are expected to add maps and spatial reasoning whenever an answer carries this framing.

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geographical contiguity and the people's will

Geographical contiguity and the people's will are twin principles used to settle inter-state boundary disputes in India: the disputed area should physically adjoin the claimant state, and the preference of its residents should decide the outcome. They appear alongside historical facts, administrative convenience and ethnicity in boundary frameworks. For UPSC (GS-2/GS-3), they recur in questions on federalism, state reorganisation and border disputes.

Example: The five agreed principles of Assam and Meghalaya for settling their boundary dispute

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geographical indication

A geographical indication is an intellectual property tag granted to a product whose quality, reputation, or special character comes essentially from the place where it is made. It assures buyers of authenticity and stops producers elsewhere from free-riding on the region's name. In India, GI tags are registered under the Geographical Indications of Goods (Registration and Protection) Act, 1999.

Example: Darjeeling tea, the first Indian product to receive a GI tag, can only be labelled Darjeeling if it is grown in the Darjeeling region.

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Geographical Indication (GI)

A Geographical Indication (GI) is an intellectual property right that identifies goods as originating from a specific region where a given quality, reputation or characteristic is essentially linked to that origin. In India, GIs are registered under the Geographical Indications of Goods (Registration and Protection) Act, 1999, and the GI tag helps producers command premium prices and prevents misuse of the regional name.

Example: Darjeeling tea was the first Indian product to receive a GI tag.

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Geographical scope

Geographical scope denotes the spatial extent or coverage of a phenomenon, policy or study, such as the states a river basin spans or the regions a scheme reaches. In UPSC answers it sets boundaries for analysis: stating the geographical scope of a question on Himalayan hazards or maritime security shows the examiner the candidate is not overgeneralising. It is a standard GS-1 and GS-3 framing device.

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geographically the largest

Geographically the largest is a fragment pointing to India's largest state by area: Rajasthan, at about 342,239 square kilometres, roughly a tenth of the country's land area. Its size shapes its desert ecology, long border with Pakistan, mineral resources and administrative span. For UPSC (GS-1, Indian geography), state-area superlatives are classic Prelims facts, and area also matters in Mains answers on regional development.

Example: Rajasthan, India's largest state by area

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Geography and external support

Geography and external support refers to the North-East's porous borders with Myanmar, Bangladesh, Bhutan and China, which gave insurgents sanctuaries, arms routes and training camps. It matters because no insurgency survives long without a rear base, and diplomacy with neighbours has been central to ending them.

Example: ULFA camps in Bhutan destroyed in Operation All Clear, 2003

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geological time scale

The geological time scale is the standard chart dividing Earth's 4.6-billion-year history into eons, eras, periods and epochs, built from rock strata, fossils and radiometric dating. It runs from the Hadean eon to the present Holocene epoch, placing events like the rise of dinosaurs in the Mesozoic. For UPSC, it underpins geography and environment questions on rock systems, Gondwana coal and mass extinctions.

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Geomorphology (12)

Geomorphology is the branch of physical geography studying landforms, their origin and the processes shaping them, such as weathering, erosion, plate tectonics and glaciation. It explains features from the Himalayas' fold mountains to coastal deltas and desert dunes. For UPSC, it is the foundation of GS-1 physical geography, underpinning answers on earthquakes, volcanism, river systems and India's physiographic divisions.

Example: The formation of the Himalayas through the collision of the Indian and Eurasian tectonic plates.

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George F. Kennan

George F. Kennan (1904-2005) was the American diplomat whose 1946 'Long Telegram' from Moscow and 1947 'X Article' formulated the US doctrine of containment of the Soviet Union. He argued Soviet expansionism should be checked by patient, firm counterpressure rather than direct war, shaping Cold War strategy for decades. For UPSC, he is the key name in GS-2 world-history and international-relations answers on Cold War origins.

Example: His 1946 Long Telegram from Moscow, which convinced Washington to adopt containment as grand strategy.

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George Stephenson's locomotives (from 1814)

George Stephenson (1781-1848) was the English engineer whose steam locomotives launched the railway age, beginning with the Blucher of 1814 and culminating in the Rocket, winner of the 1829 Rainhill Trials. His Stockton and Darlington line of 1825 was the world's first public railway. For UPSC, he anchors GS-1 Industrial Revolution answers on how railways transformed industry, cities and imperial control, including in colonial India.

Example: The Rocket's victory at the 1829 Rainhill Trials, which proved steam locomotion commercially viable.

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George Washington

George Washington (1732-1799) was the commander of the Continental Army in the American War of Independence and the first President of the United States (1789-1797). His voluntary relinquishment of power after two terms set the precedent for republican restraint and peaceful transfer of authority. For UPSC, he features in GS-1 world-history answers on the American Revolution and the rise of modern democratic constitutions.

Example: His Farewell Address of 1796, warning against permanent foreign alliances and partisan faction.

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geostationary transfer orbit (GTO)

A geostationary transfer orbit is a highly elliptical orbit used as a stepping stone between the initial launch orbit and the final geostationary orbit. The satellite is first placed into this elongated path, then its own engine fires at the highest point (apogee) to circularise the orbit at about 35,786 km above the equator. This two-step route is the standard, fuel-efficient way of delivering communication satellites to their final slot.

Example: India's GSLV places satellites such as INSAT-3DR into GTO, after which the satellites raise themselves to geostationary orbit.

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Geothermal energy

Geothermal energy is heat stored beneath the Earth's surface, used for direct heating or electricity generation at suitable sites. It offers firm renewable power but is location-specific and costly to drill.

Example: The Puga valley in Ladakh is India's best-known geothermal prospect.

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GEP

GEP stands for Gross Environment Product, a measure of the economic value of ecosystem goods and services such as food, water, climate regulation, flood control and recreation. Unlike Green GDP, which starts from conventional GDP and subtracts environmental damage, GEP builds a separate account of nature's own economic contribution, making ecosystems economically visible. Uttarakhand became the first Indian state to adopt GEP, notifying the framework in 2021 and launching the index in 2024 on the initiative of environmentalist Anil Joshi.

Example: Uttarakhand's GEP framework values the state's forests, water, air and soil alongside GDP, providing a basis for eco-compensation between regions.

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GER

GER stands for Gross Enrolment Ratio, the standard education indicator that expresses total enrolment at a given level as a percentage of the population of the official age group for that level. It can exceed 100 per cent because of over-age or under-age enrolment. For UPSC, GER is the headline number used to judge access to schooling and higher education across states and over time.

Example: India's higher-education GER of about 28.4 per cent in 2021-22, reported in the All India Survey on Higher Education, is the benchmark NEP 2020 wants raised to 50 per cent by 2035.

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German Confederation

The German Confederation (Deutscher Bund, 1815-1866) was the loose association of 39 German states created by the Congress of Vienna after Napoleon's defeat, with Austria presiding. It preserved a fragmented Germany while nationalist and liberal pressures grew, until Prussia's victory in the Austro-Prussian War of 1866 dissolved it. For UPSC, it is the backdrop for GS-1 answers on German unification, Bismarck and 19th-century European nationalism.

Example: Its replacement by the Prussian-led North German Confederation after the 1866 Austro-Prussian War.

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German Empire 1871

The German Empire proclaimed at Versailles in January 1871 is the unified German national state under the Prussian king as Kaiser, completing Bismarck's three wars of unification. It replaced Austria as the arbiter of Central Europe and transformed the balance of power.

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Germany

Germany is the largest economy of Europe and the most populous state of the European Union, reunified in 1990 after the fall of the Berlin Wall and the end of Cold War division. Its export-led manufacturing strength and EU leadership role make it a key partner for India. It matters for UPSC because Germany anchors questions on the European Union, post-Cold War European order, and India's technology and green energy partnerships, such as the Green and Sustainable Development Partnership.

Example: The India-Germany Green and Sustainable Development Partnership, under which cooperation spans green hydrogen, renewables and sustainable urban development.

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Gettysburg 1863

Gettysburg of July 1863 is the bloodiest battle of the American Civil War and, with Vicksburg, its turning point: Lee's invasion of the North was repelled. Lincoln's Gettysburg Address redefined the war as a test of government by the people.

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Ghadar

The Ghadar movement was the revolutionary campaign of Indian immigrants in North America, organised through the Ghadar Party founded in San Francisco in 1913 under Lala Har Dayal with the newspaper Ghadar ('revolt'). It aimed to overthrow British rule by armed revolt and sent volunteers to India during World War I. For UPSC, it is a key GS-1 topic linking the diaspora, revolutionary nationalism and wartime sedition conspiracies.

Example: The 1915 Ghadar conspiracy, foiled when returning revolutionaries were arrested on arrival in Punjab.

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Ghadar Party

The Ghadar Party was the revolutionary organisation founded in 1913 at San Francisco by expatriate Indians led by Lala Har Dayal and Sohan Singh Bhakna, publishing the newspaper Ghadar (Revolt). It aimed to overthrow British rule through armed revolt, organising the abortive Ghadar mutiny of 1915 during the First World War. It matters for UPSC because it represents the international dimension of India's freedom struggle, linking the Komagata Maru incident of 1914 with wartime revolutionary conspiracies.

Example: The Komagata Maru episode of 1914, in which Ghadar sympathisers aboard the ship were turned back at Vancouver under Canada's exclusionary immigration laws.

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Ghaggar

The Ghaggar is a seasonal, rain-fed river rising in the Shivalik hills of Himachal Pradesh and flowing through Haryana and Punjab before disappearing in the Rajasthan desert. Scholars identify it with the Vedic Sarasvati's eastern course, and its basin hosts major Harappan sites like Kalibangan and Banawali. For UPSC, it links GS-1 physical geography with ancient-history questions on the Harappan civilisation and the Sarasvati debate.

Example: The Harappan city of Kalibangan, located on the Ghaggar's banks in Rajasthan's Hanumangarh district.

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Ghaghara

The Ghaghara is a major left-bank tributary of the Ganga, rising near Mansarovar in Tibet, flowing through Nepal (where it is called the Karnali) and joining the Ganga in Bihar. It carries heavy Himalayan sediment and is prone to flooding in eastern Uttar Pradesh and Bihar. For UPSC, it is a standard GS-1 drainage-system point, often mapped alongside the Gandak and Kosi.

Example: Its confluence with the Ganga near Chhapra in Bihar's Saran district.

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Ghalla-bakhshi

Ghalla-bakhshi (batai) was the Mughal crop-sharing system of land revenue in which the harvested grain was divided between the state and the cultivator in a fixed ratio, after the crop was reaped and threshed. It suited regions where yields were uncertain and avoided cash assessment. For UPSC, it is one of the three classic Mughal revenue methods, asked alongside zabti and kankut in GS-1 medieval-history questions.

Example: Its use in Kashmir and parts of the Mughal provinces where measurement-based assessment was impractical.

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Ghana

Ghana is the West African nation that became the first sub-Saharan African colony to win independence, in 1957 under Kwame Nkrumah, taking its name from the medieval Ghana Empire. Rich in gold and cocoa, it is a leading African democracy and a Commonwealth member. For UPSC, it illustrates GS-2 decolonisation, the Non-Aligned Movement's African roots, and India's Africa policy through development partnerships.

Example: Nkrumah's 1957 independence movement, which inspired anti-colonial struggles across Africa.

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Ghatika

A ghatika was a renowned centre of Vedic learning in ancient South India, a residential college where scholars studied the Vedas, grammar and philosophy under royal patronage. The ghatika of Kanchipuram under the Pallavas was especially famous, attracting scholars across traditions. For UPSC, it is the southern counterpart to Nalanda and Taxila in GS-1 art-and-culture questions on ancient Indian education.

Example: The Kanchipuram ghatika, patronised by Pallava kings and famed as a seat of Sanskrit learning.

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Ghatotkacha

Ghatotkacha was the early Gupta king who preceded Chandragupta I, likely his father, ruling around the turn of the 4th century CE when the Guptas were still a modest power in eastern India. He bears the simple title 'Maharaja', unlike his imperial successors. For UPSC, he marks the pre-imperial phase of the Gupta dynasty in GS-1 ancient-history questions. The name is also that of Bhima's son in the Mahabharata.

Example: The Allahabad pillar inscription of Samudragupta, which names Ghatotkacha in the Gupta genealogy.

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Ghazal

The ghazal is a lyrical poetic form of rhyming couplets sharing a refrain, originating in Arabic verse and refined in Persian before flourishing in Urdu and Hindi. Each couplet (sher) is self-contained, traditionally treating love, mysticism and loss, with masters like Mir, Ghalib and Faiz. For UPSC, it is a core GS-1 art-and-culture topic on Indo-Islamic literary heritage and the composite culture of medieval India.

Example: Mirza Ghalib's 19th-century ghazals, which remain central to Urdu literary identity.

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ghazal, qawwali, kafi, malfuzat

Ghazal, qawwali, kafi and malfuzat are literary and musical forms of the Sufi tradition. The ghazal is a lyrical poem of love and devotion, qawwali its devotional musical performance, kafi a Punjabi devotional verse form, and malfuzat collections of a Sufi saint's recorded conversations. Together they show how Sufism spread through vernacular culture. For UPSC (GS-1, medieval history and culture), they illustrate Bhakti-Sufi syncretism.

Example: Fawa'id-ul-Fu'ad, Amir Hasan's record of Nizamuddin Auliya's discourses

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Ghazipur

Ghazipur is a legacy municipal solid waste dumpsite in east Delhi, operational since 1984 and one of the city's three major landfills alongside Bhalswa and Okhla. It symbolises India's landfill crisis: the mountain of unprocessed waste emits methane, leaches toxins into groundwater and periodically catches fire, and it has been the focus of biomining and remediation drives under the Swachh Bharat Mission.

Example: Delhi's Ghazipur dumpsite has repeatedly caught fire from methane build-up in the decomposing waste, drawing national attention to legacy waste remediation.

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ghettoisation of women's labour

Ghettoisation of women's labour is the concentration of women in a narrow set of low-paid, insecure and stereotypically female occupations such as domestic work, care work and piece-rate jobs, which reinforces the gender wage gap. It is linked to limited mobility, skilling gaps and social norms. For UPSC (GS-1/GS-3), it frames questions on women's workforce participation, informal employment and the care economy.

Example: India's ASHA community health workers, over a million women in honorarium-based care work

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GHI

GHI stands for the Global Hunger Index, an annual report by Concern Worldwide and Welthungerhilfe that scores countries on four indicators: undernourishment, child stunting, child wasting and child mortality. Lower scores mean less hunger. For UPSC, it is the most cited global benchmark for India's nutrition outcomes, though the government disputes its methodology.

Example: India ranked 111th of 125 countries in the 2023 index, a ranking the government rejected as resting on a small opinion-poll sample.

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Ghiyaspur

Ghiyaspur is the medieval village, now Nizamuddin Basti in Delhi, named after Sultan Ghiyasuddin Balban, who built his Lal Mahal palace there. It became famous as the place where the Chishti saint Hazrat Nizamuddin Auliya established his khanqah in the 13th century on the Yamuna's banks, drawing seekers from all walks of life. For UPSC, it links Sultanate political history with the Sufi movement and Delhi's urban growth.

Example: Nizamuddin Auliya's khanqah at Ghiyaspur, which later grew around his dargah

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Ghiyasuddin Balban

Ghiyasuddin Balban was the ninth Sultan of Delhi, ruling from 1266 to 1287. He crushed the power of the Chahalgani, the group of forty Turkish nobles, created the Diwan-i-Arz military department, and promoted the theory of divine kingship, styling himself Zil-i-Ilahi, the Shadow of God. He enforced strict Persian court etiquette. For UPSC, his reign illustrates the consolidation of Sultanate authority and the politics of the Turkish nobility.

Example: Balban's destruction of the Chahalgani, the corps of forty Turkish nobles

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Ghiyasuddin Tughlaq

Ghiyasuddin Tughlaq, originally Ghazi Malik, founded the Tughlaq dynasty in 1320 after overthrowing Khusrau Khan. Ruling until 1325, he restored order after Khalji-era instability, built the massive Tughlaqabad fort near Delhi, and pushed expansion into the Deccan. He died when a wooden pavilion collapsed at Afghanpur, a death some chroniclers link to his son Jauna Khan, the future Muhammad bin Tughlaq. For UPSC, he marks the start of the third Sultanate dynasty.

Example: the construction of the Tughlaqabad fort near Delhi during his reign

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Ghost beneficiaries

Ghost beneficiaries are fake, duplicate or deceased names on ration rolls used to divert subsidised grain. Aadhaar seeding and ePoS authentication have deleted crores of such entries, generating large claimed savings. For UPSC they are the classic leakage mechanism of welfare schemes.

Example: The deletion of lakhs of duplicate ration cards after Aadhaar seeding shows the ghost-beneficiary cleanup.

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Ghurid conquest

The Ghurid conquest refers to the late 12th century invasions of north India by Muhammad of Ghor. After losing the First Battle of Tarain in 1191, he won the Second Battle of Tarain in 1192 against Prithviraj Chauhan and defeated Jayachandra of Kannauj at Chandawar in 1194. His general Qutb-ud-din Aibak consolidated these gains and founded the Delhi Sultanate in 1206. For UPSC, it explains the transition from Rajput kingdoms to Sultanate rule.

Example: the Second Battle of Tarain in 1192, where Muhammad of Ghor defeated Prithviraj Chauhan

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GIFT City

GIFT City, the Gujarat International Finance Tec-City near Gandhinagar, is India's first operational smart city built as an international financial services centre. It hosts the International Financial Services Centres Authority (IFSCA), the unified regulator for India's offshore financial business, along with exchanges like India INX. For UPSC, it embodies the strategy of onshoring offshore finance that earlier flowed to Singapore or Dubai.

Example: India INX and NSE IFSC operate from GIFT City, letting Indian firms raise foreign-currency finance on Indian soil.

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Gifts and hospitality

Gifts and hospitality is a GS-4 ethics theme about how civil servants should handle presents, favours, and entertainment offered by interested parties. Accepting them can create conflicts of interest, erode impartiality, and breach the Central Civil Services (Conduct) Rules, which restrict and require reporting of gifts. Integrity demands refusing or declaring anything beyond token courtesy. For UPSC, it is a standard case-study trigger testing integrity, accountability, and knowledge of the code of conduct.

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gig and platform workers

Gig and platform workers are people who earn through short-term tasks or app-based platforms outside a traditional employer-employee relationship, such as ride-hailing drivers and food-delivery riders. The Code on Social Security, 2020 was the first Indian law to define them and provide social security through a dedicated fund, and NITI Aayog projects the gig workforce could reach 2.35 crore by 2029-30. For UPSC, they connect labour codes, social security and the future of work.

Example: Budget 2025-26 announced identity cards, e-Shram registration and PM Jan Arogya Yojana health cover for gig and platform workers.

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Gig and platform workers

Gig and platform workers are people who earn through short-term tasks or app-based platforms outside a traditional employer-employee relationship, such as ride-hailing drivers and food-delivery riders. The Code on Social Security, 2020, was the first Indian law to define them and provide for their social security through a dedicated fund. NITI Aayog projects the gig workforce could reach 2.35 crore by 2029-30. For UPSC, they connect labour codes, social security, and the future of work.

Example: Budget 2025-26 announced identity cards, e-Shram registration, and PM Jan Arogya Yojana health cover for one crore gig workers

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gig and platform workers (and aggregators) their first legal recognition

Gig and platform workers (and aggregators) got their first legal recognition in the Code on Social Security, 2020, which defined gig workers, platform workers and aggregators in Indian labour law for the first time and provided for a Social Security Fund financed by aggregator contributions of 1-2 per cent of annual turnover. It moved app-based work from a legal grey zone into statutory coverage. For UPSC (GS-2/GS-3), it is the key fact on labour codes and informal work.

Example: The Code on Social Security, 2020, passed in September 2020

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Gig-economy capture

Gig-economy capture, in UPSC context, refers to the concern that a few large digital platforms dominate gig markets and the regulatory conversation around them, weakening workers' bargaining power and the state's ability to set labour standards. Algorithmic management, opaque pay structures, and data monopolies let platforms shape rules in their favour. For UPSC, it links platform capitalism with competition policy, labour welfare, and the case for portable social security.

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Gini

Gini refers to Corrado Gini, the Italian statistician (1884-1965) who developed the Gini coefficient in 1912. His work on measuring statistical dispersion gave economists a single-number summary of inequality, now used worldwide for income and wealth distributions. For UPSC, the name appears whenever inequality measurement is discussed, alongside Lorenz curves and poverty indices in economy and statistics questions.

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Gini coefficient

The Gini coefficient is a statistical measure of inequality in income or wealth distribution within a population, ranging from 0 for perfect equality to 1 for maximum inequality. It is derived from the Lorenz curve as the ratio of the area between the line of equality and the curve to the total area under the line. For UPSC, it is the standard tool for questions on inequality, inclusive growth, and comparing distributive outcomes across states and countries.

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Girnar inscription

The Girnar inscription is the famous Junagadh rock inscription of the Saka ruler Rudradaman I, dated to about 150 CE. Written in Sanskrit prose, it records the repair of the Sudarshana lake, originally built under the Mauryas, after it burst during his reign. It is celebrated as one of the earliest long royal inscriptions in chaste Sanskrit. For UPSC, it is key evidence for Saka rule, the rise of Sanskrit, and ancient water management.

Example: its account of the reconstruction of the Sudarshana lake after it burst

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Girondins

The Girondins were a moderate republican faction in the French Revolution, named after the Gironde department whose deputies led them. They favoured a constitutional republic, free markets, and war against monarchical Europe, opposing the radical Jacobins and the Paris mob. After losing the power struggle in 1793, many were guillotined during the Reign of Terror. For UPSC, they illustrate revolutionary factionalism and the Revolution's slide from moderation to terror.

Example: their overthrow by the Jacobins in June 1793 during the French Revolution

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GIS and Decision Support System integration

GIS (Geographical Information System) is a system for capturing, storing and analysing spatially referenced data on maps, and a Decision Support System is software that combines data, models and analytical tools to aid decision-making. In environmental impact assessment, integrating GIS layers such as protected areas, forests, wetlands and pollution sources with decision support tools helps appraisal committees screen projects objectively. India's Parivesh portal uses GIS-based tools so that clearance decisions are informed by spatial environmental data.

Example: A GIS-based screening on the Parivesh portal can flag when a proposed project site overlaps an eco-sensitive zone, helping the appraisal committee impose appropriate conditions.

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GIS-based national databases

GIS-based national databases are centralized geospatial repositories that map infrastructure, land use, utilities and administrative boundaries on digital layers for planning and monitoring. They enable data-driven governance by integrating departmental datasets on one platform. For UPSC, they are linked to the PM Gati Shakti National Master Plan, Digital India and disaster-management answers.

Example: The PM Gati Shakti National Master Plan platform, which layers infrastructure projects on GIS maps

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Giuseppe Garibaldi

Giuseppe Garibaldi was the Italian military leader whose campaigns were decisive in Italy's unification, the Risorgimento. Leading his volunteer Redshirts, he conquered Sicily and Naples in the Expedition of the Thousand in 1860 and handed southern Italy to Victor Emmanuel II. A republican who accepted monarchy for unity's sake, he became a global symbol of nationalism. For UPSC, he pairs with Mazzini and Cavour in world history questions on nationalist movements.

Example: the Expedition of the Thousand in 1860, when his Redshirts conquered Sicily and Naples

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Giuseppe Mazzini

Giuseppe Mazzini was the Italian nationalist thinker called the soul of the Risorgimento. He founded the Young Italy movement in 1831 to unite Italy as a democratic republic through popular uprising, and his writings inspired nationalists across Europe, including Indian freedom fighters. Though his own revolts failed, his ideas shaped the unification achieved by others. For UPSC, he represents the ideological phase of nationalism in world history.

Example: the founding of the Young Italy movement in 1831

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Give every option genuine merits, demerits and an ethical read

This is a GS-4 case-study technique: when a question asks you to evaluate courses of action, give every option genuine merits, demerits, and an ethical read instead of praising your preferred option and dismissing the rest. Listing real strengths and weaknesses of each alternative, then judging them on values like integrity, empathy, and public interest, shows balanced ethical reasoning. For UPSC, examiners reward this even-handed options analysis over one-sided advocacy.

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Give every option the same four-part treatment

This is a GS-4 answer-writing discipline for case studies: give every option the same four-part treatment, typically what the option involves, its merits, its demerits, and its ethical evaluation. Applying an identical structure to all alternatives prevents bias toward a pre-chosen answer and makes comparison transparent. For UPSC, this structured uniformity signals methodical decision-making, a core administrative virtue that the ethics paper tests.

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Give It Up

Give It Up was the Government of India's 2015 campaign urging well-off households to voluntarily surrender their LPG cooking-gas subsidy. Launched on 27 March 2015, it appealed to citizens who could afford market prices to give up the subsidy so that savings could fund connections for poor families. About one crore households eventually opted out, saving thousands of crores of rupees. For UPSC, it is a case study in behavioural nudges, subsidy rationalisation, and cooperative welfare.

Example: by 2016 about one crore households had voluntarily surrendered their LPG subsidy

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Give me blood, and I will give you freedom

Give me blood, and I will give you freedom is Subhas Chandra Bose's famous rallying cry, delivered in a speech to the Indian National Army in Burma in July 1944. The full line, It is blood alone that can pay the price of freedom, demanded supreme sacrifice from Indians in exchange for liberation from British rule. For UPSC, the slogan captures Bose's militant nationalism, the INA's role in the freedom struggle, and the power of leadership in mass mobilisation.

Example: the July 1944 INA rally in Burma where Bose issued this call for sacrifice

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Glacial (ice)

The complete concept is the glacial period, commonly called an ice age, when large parts of Earth's surface are covered by continental ice sheets and glaciers. The most recent, the Pleistocene ice age, saw repeated glacial advances and retreats, with the Last Glacial Maximum about 20,000 years ago shaping valleys, lakes, and sea levels. For UPSC, glacial cycles explain landforms like U-shaped valleys and moraines, and illustrate past climate change in physical geography.

Example: the Last Glacial Maximum around 20,000 years ago

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glacial lake outburst flood (GLOF)

A glacial lake outburst flood is the sudden, catastrophic release of water from a glacial lake when its moraine or ice dam fails, sending a wall of water and debris downstream. Retreating Himalayan glaciers are creating more such lakes.

Example: the October 2023 South Lhonak GLOF in Sikkim destroyed the Teesta-III dam

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Glasnost

Glasnost, Russian for openness, was Mikhail Gorbachev's policy from 1985 of greater transparency, free speech, and public debate in the Soviet Union. Paired with perestroika, or restructuring, it loosened censorship, allowed criticism of the system, and unintentionally unleashed nationalist and democratic forces. For UPSC, glasnost is central to explaining the Cold War's end, the Soviet collapse in 1991, and how reforms can escape their architects' control.

Example: Gorbachev's launch of glasnost and perestroika in the mid-1980s

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Glasnost and Perestroika

Glasnost and Perestroika are Gorbachev's twin policies of openness and restructuring in the late 1980s, meant to reform Soviet communism. They instead unleashed the nationalist movements that dissolved the USSR in 1991 and ended the Cold War.

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Glass-Steagall Act

The Glass-Steagall Act was the 1933 United States law that separated commercial banking from investment banking after the 1929 crash, barring deposit-taking banks from speculative securities dealing. It also created federal deposit insurance. Much of it was repealed by the Gramm-Leach-Bliley Act in 1999. For UPSC, it is the classic example of financial regulation born from crisis, often cited in debates on banking reform and the 2008 global financial crisis.

Example: its partial repeal through the Gramm-Leach-Bliley Act of 1999

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Glaw Lake

Glaw Lake is a high-altitude lake in Arunachal Pradesh's Kamlang Tiger Reserve that was designated India's 101st Ramsar site in August 2026. It was the state's first Ramsar site, extending international wetland recognition to the Eastern Himalayas.

Example: Glaw Lake's Ramsar designation in August 2026 made Arunachal Pradesh the newest Indian state on the Ramsar list.

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Gleying

Gleying is a soil-forming process that occurs in permanently or periodically waterlogged soils. With pores saturated, oxygen is depleted and anaerobic conditions reduce ferric iron to ferrous iron, giving the soil characteristic grey, blue-grey, or greenish colours, often with rust-coloured mottles where re-oxidation occurs. The resulting gley soils are sticky and hard to cultivate. For UPSC, gleying explains hydromorphic soils in lowlands, deltas, and paddy regions.

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Glivec

Glivec is the brand name of imatinib, a targeted therapy developed by Novartis that transformed chronic myeloid leukaemia from a fatal disease into a manageable condition. In Novartis v. Union of India (2013), the Supreme Court of India rejected a patent for Glivec's beta-crystalline form under Section 3(d) of the Patents Act, ruling it was not a genuine invention but a mere new form of a known substance.

Example: The 2013 Supreme Court verdict on Glivec kept affordable generic imatinib available in India and is a landmark in the balance between patent rights and public health.

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Global AI Impact Commons

The Global AI Impact Commons is a voluntary global platform launched at the India AI Impact Summit 2026 in New Delhi, documenting over 80 AI impact stories across more than 30 countries. It emerged as an official deliverable of the summit's Working Group on AI for Economic Growth and Social Good, functioning as a shared repository that lets countries discover, replicate and scale proven AI deployments for development.

Example: The Commons collects impact stories such as AI-assisted tuberculosis detection and AI farmer advisories so that other countries can adapt them to their own contexts.

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global audience

Global audience is the worldwide public that consumes a country's media, culture and messaging, a core asset of soft power and public diplomacy. For UPSC (GS-2, international relations), reaching a global audience through the diaspora, cultural exports, international broadcasting and digital platforms is how India projects its narrative and counters hostile propaganda.

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Global Biofuels Alliance

The Global Biofuels Alliance is an India-led multi-stakeholder initiative launched on 9 September 2023 on the sidelines of the G20 Summit in New Delhi. Backed initially by 19 countries and 12 international organisations, with the United States and Brazil as key partners, it promotes biofuel adoption through capacity building, technology sharing, and policy coordination. For UPSC, it showcases India's energy-transition diplomacy and Global South leadership in clean fuels.

Example: its launch by Prime Minister Modi with leaders including Joe Biden and Lula at the New Delhi G20 Summit

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Global Capability Centres

Global Capability Centres are offshore units set up by multinational companies to handle functions like research, engineering, IT, and analytics for their global operations. India hosts the world's largest concentration of GCCs, clustered in Bengaluru, Hyderabad, and Chennai, drawn by skilled talent and cost advantages. They have moved up the value chain from back-office work to innovation hubs. For UPSC, GCCs matter for services exports, employment, and India's digital economy story.

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Global Capability Centres (GCCs)

The complete concept is the Global Capability Centre (GCC), an offshore arm of a multinational that delivers technology, research, finance, and analytics support to the parent organisation worldwide. India is the leading GCC destination, and these centres now drive high-skill jobs and research rather than routine outsourcing. For UPSC, GCCs illustrate India's shift from cost arbitrage to a global innovation hub in services trade.

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Global Capability Centres are

The complete concept is the Global Capability Centre: these are captive offshore units through which multinational firms centralise knowledge work such as software development, product engineering, and data analytics. Their rapid growth in India reflects the country's deep STEM talent pool and improving digital infrastructure. For UPSC, the phrase signals questions on foreign investment, high-value services exports, and urban employment clusters.

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Global Cooling Pledge

The Global Cooling Pledge is the COP28 commitment by 66 governments to cut cooling-related emissions by at least 68 per cent from 2022 levels by 2050. It matters because cooling demand is rising fastest where heat risk is highest, so efficient and passive cooling is adaptation and mitigation at once.

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Global Coral Reef Monitoring Network

The Global Coral Reef Monitoring Network (GCRMN) is an operational network of the International Coral Reef Initiative, coordinated with UNESCO's Intergovernmental Oceanographic Commission, that monitors and reports on the status and trends of coral reefs worldwide. Its periodic Status of Coral Reefs of the World reports are the authoritative global assessments of reef health.

Example: GCRMN's Status of Coral Reefs of the World 2020 report found that 14 per cent of the world's coral had been lost between 2009 and 2018.

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Global Depository Receipts

Global Depository Receipts are negotiable certificates issued by a depository bank that represent shares in a foreign company and trade on international stock exchanges, typically denominated in a foreign currency. They let companies raise capital abroad while giving overseas investors exposure without dealing in the home market. For UPSC, GDRs appear in questions on capital markets, alternatives to external commercial borrowing, and cross-border investment flows.

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Global Environment Facility

The Global Environment Facility (GEF) is a multilateral fund established on the eve of the 1992 Rio Earth Summit to help developing countries meet the costs of global environmental protection. It serves as the financial mechanism for major conventions including the Convention on Biological Diversity, the UN Framework Convention on Climate Change, the Stockholm Convention and the UN Convention to Combat Desertification.

Example: Developing countries access GEF grants to fund biodiversity conservation, climate adaptation and chemicals management projects under these conventions.

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Global Fund for Coral Reefs

The Global Fund for Coral Reefs (GFCR) is a blended-finance fund dedicated to coral reef conservation, combining grants and investment capital from UN agencies and philanthropic partners. It finances marine protected areas, reef restoration and reef-positive businesses in reef-dependent developing countries, aiming to make reef conservation financially sustainable.

Example: The Fund channels blended finance to reef-positive enterprises, such as sustainable fisheries and eco-tourism ventures, in coral-dependent coastal economies.

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Global Gender Gap Report

The Global Gender Gap Report is the World Economic Forum's annual benchmarking of gender parity across economic participation, educational attainment, health and political empowerment. Scores run from 0 to 1, with 1 representing full parity. For UPSC, it is the standard international reference for India's gender outcomes and the slow closure of the economic gender gap.

Example: India ranked 129th of 146 countries in the 2024 edition, dragged down by low female labour-force participation.

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Global Goal on Adaptation

The Global Goal on Adaptation is established under Article 7 of the Paris Agreement (2015) and aims to enhance adaptive capacity, strengthen resilience and reduce vulnerability to climate change. It was given a concrete implementation framework through the Glasgow-Sharm el-Sheikh work programme and the UAE Framework for Global Climate Resilience adopted at COP28 in 2023.

Example: The UAE Framework for Global Climate Resilience, adopted at COP28, set thematic targets on water, food, health and ecosystems under the Global Goal on Adaptation.

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Global Hunger Index

The Global Hunger Index is the annual score published by Concern Worldwide and Welthungerhilfe measuring hunger across countries on four indicators, namely undernourishment, child stunting, child wasting and child mortality, on a 0 to 100 scale where lower is better. It matters for UPSC because India's low rankings have been politically contested, with the government disputing its methodology, making it a recurring topic in debates on nutrition policy, NFSA and the National Family Health Survey findings.

Example: The 2024 report's finding that India remained in the 'serious' hunger category, triggering a government rebuttal of the index's methodology.

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Global Land Outlook

The Global Land Outlook is the flagship assessment report of the UN Convention to Combat Desertification (UNCCD) on the state of land degradation worldwide and pathways to restoration. Its second edition, released in 2022, assessed land degradation trends and the economics of land restoration.

Example: The second Global Land Outlook (2022) warned that up to 40 per cent of the world's land is degraded, threatening food security and livelihoods.

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Global MPI

The Global Multidimensional Poverty Index is the joint UNDP and Oxford Poverty and Human Development Initiative measure that scores deprivation across health, education and living standards using ten indicators. A person counts as multidimensionally poor if deprived in at least a third of the weighted indicators. For UPSC, it shifted the poverty debate from income lines to lived deprivation.

Example: Its 2023 report recorded about 135 million Indians exiting multidimensional poverty between 2015-16 and 2019-21.

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Global MPI (UNDP/OPHI)

The complete concept is the Global Multidimensional Poverty Index, published jointly by the United Nations Development Programme and the Oxford Poverty and Human Development Initiative. It measures poverty across health, education, and living standards using ten indicators, combining the headcount of the poor with the intensity of their deprivation. The 2023 report found 25 countries, including India, had halved their MPI values within 15 years. For UPSC, it is the standard non-income poverty measure.

Example: India's 415 million people exiting multidimensional poverty between 2005-06 and 2019-21, reported in the 2023 Global MPI

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Global Mutirao decision

The Global Mutirao decision was the headline outcome of COP30, held in Belem, Brazil, in 2025, named after the Portuguese word mutirao meaning collective effort. For the first time in any COP text, it acknowledged that a temporary overshoot of the 1.5 degrees Celsius warming limit is likely, shaping the agenda for the next round of climate commitments.

Example: The decision's acknowledgement of a likely temporary 1.5-degree overshoot marked a turning point in how COP outcomes frame the gap between current pledges and the Paris temperature goal.

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global nuclear disarmament

Global nuclear disarmament is the goal of eliminating all nuclear weapons worldwide through universal, non-discriminatory and verifiable agreements. India has long advocated it while refusing to join the NPT, which it calls discriminatory, and links its own arsenal to the absence of global disarmament. For UPSC (GS-2, international relations), it is India's signature arms-control position and a recurring Mains theme.

Example: Rajiv Gandhi's Action Plan for a Nuclear-Weapon-Free and Non-Violent World Order, presented to the UN General Assembly on 9 June 1988

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global outsourcing wave

Global outsourcing wave is the late-20th-century shift of services work, especially IT and business processes, from Western firms to lower-cost countries. India became its biggest beneficiary thanks to English-speaking engineers, telecom reforms and the Y2K opportunity. For UPSC (GS-3, economy), it explains India's services-led growth model, the rise of the IT sector and questions on globalisation and employment.

Example: The Y2K remediation contracts of the late 1990s that launched India's IT services boom

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Global Partnership on AI (GPAI)

The Global Partnership on AI (GPAI) is a multi-stakeholder initiative launched in June 2020 to guide the responsible development and use of artificial intelligence grounded in human rights and democratic values. India is a founding member, and its secretariat is hosted at the OECD.

Example: India chaired the GPAI Council in 2023, placing responsible AI on the agenda during its G20 presidency year.

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global power structure was transformed

Global power structure was transformed is a fragment referring to the post-Cold War shift from a bipolar US-USSR order to American-led unipolarity, later giving way to multipolarity with the rise of China, the European Union and other powers. It captures how wars, economic shifts and new institutions reorder world hierarchy. For UPSC (GS-2, international relations), it frames questions on world order, strategic autonomy and India's foreign policy.

Example: The disintegration of the Soviet Union in December 1991

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Global rank

Global rank is a country's comparative standing on an indicator relative to other countries, and in renewable energy it is measured by installed capacity. The article's table places India 4th in the world in total renewable energy capacity, 3rd in solar capacity and 4th in wind capacity, reflecting the scale of India's energy transition.

Example: India's global rank of 3rd in solar capacity reflects rapid solar capacity additions under the National Solar Mission.

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Global significance

Global significance, in UPSC answer writing, is the dimension of an issue that looks beyond India to its worldwide impact. Examiners expect candidates to connect topics to geopolitics, the global economy, climate, or international institutions, showing how an event reshapes trade routes, alliances, or norms. For UPSC, adding a crisp global-significance angle to mains answers demonstrates the international outlook the syllabus demands.

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global silver shortage

Global silver shortage is the structural supply deficit in the world silver market, now in its sixth consecutive year: the 2026 shortfall is projected at about 46.3 million ounces, with over 760 million ounces drawn from above-ground stocks since 2021. Demand from solar panels, electric vehicles and AI data centres outpaces mine supply, which is mostly a by-product of copper, lead and zinc mining. For UPSC (GS-3), it links critical minerals, energy transition and commodity markets.

Example: The World Silver Survey 2026 by Metals Focus

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Global South

Global South is the term for the developing and emerging economies of Asia, Africa and Latin America, defined by shared development challenges rather than geography. It denotes a political identity: demand for a fairer voice in global governance, climate finance and trade rules. For UPSC, it is essential GS-2 vocabulary for India's leadership pitch, from G20 presidency outreach to development partnerships framed as South-South cooperation.

Example: The Voice of Global South Summits hosted by India in 2023 during its G20 presidency.

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Global South leadership

Global South leadership refers to India's foreign-policy positioning as the voice of developing countries in global governance. It involves championing their interests on climate finance, debt relief, food security, and institutional reform, and building platforms where they set agendas rather than follow them. For UPSC, it frames questions on India's multilateral diplomacy, South-South cooperation, and its claim to a permanent UN Security Council seat.

Example: India's G20 presidency securing the African Union's admission as a permanent G20 member in 2023

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Global Stocktake

The Global Stocktake is the five-yearly assessment mechanism under Article 14 of the Paris Agreement that reviews collective progress toward its long-term goals. Its findings inform the next round of nationally determined contributions, and the first Global Stocktake concluded at COP28 in Dubai in 2023.

Example: The first Global Stocktake at COP28 called for transitioning away from fossil fuels in energy systems in a just and orderly manner.

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Global tax justice

Global tax justice is the movement to make multinational corporations pay fair taxes where they earn profits rather than shifting them to low-tax havens. Its landmark achievement is the OECD/G20 Inclusive Framework's 2021 two-pillar deal, with Pillar Two setting a 15 percent global minimum corporate tax for large multinationals. For UPSC, it connects base erosion and profit shifting (BEPS), digital-economy taxation, and developing countries' revenue rights.

Example: the October 2021 agreement by over 135 countries on the two-pillar solution

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Global Warming Potential

Global Warming Potential (GWP) is the heat trapped by a greenhouse gas over a chosen period compared with carbon dioxide, whose GWP is 1. It lets policy compare gases on a single scale: methane traps about 28 to 36 times as much heat as carbon dioxide over 100 years, nitrous oxide about 265 to 298 times.

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globalisation

Globalisation is the deepening integration of economies through trade, investment, technology and the movement of people and capital across borders. For India, the 1991 reforms opened the economy to foreign investment, lowered import barriers and linked domestic firms to global value chains. For UPSC, globalisation underpins answers on economic reform, services exports and India's changing place in world trade.

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Globalisation

Globalisation is the increasing integration of economies, societies, and cultures through cross-border flows of goods, capital, technology, labour, and ideas. Driven by liberalisation, containerisation, and digital connectivity, it has lifted growth and reduced poverty while also spreading financial contagion and cultural homogenisation. For UPSC, it is the backdrop for questions on trade policy, the WTO, supply chains, and the tension between openness and self-reliance.

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Globalisation 4.0

Globalisation 4.0 is the term popularised by the World Economic Forum for the current wave of globalisation shaped by digital technologies, artificial intelligence, and data flows. It was the theme of the WEF Annual Meeting at Davos in 2019. Unlike earlier waves driven by trade in goods, it centres on services, platforms, and the digital economy, raising new questions about data governance and inequality. For UPSC, it frames debates on digital trade and India's IT advantage.

Example: the WEF Annual Meeting 2019 in Davos adopting Globalization 4.0 as its theme

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globalisation squeezed formal-sector employment (2016 PYQ)

Globalisation squeezed formal-sector employment (2016 PYQ is a fragment pointing to a GS Paper III Mains question of 2016: how globalisation reduced employment in India's formal sector and whether increased informalisation harms development. The issue is that import competition, automation and contract labour pushed workers into informal, low-security jobs. For UPSC, it is a ready-made GS-3 answer framework on globalisation, employment and labour reforms.

Example: UPSC CSE Mains, GS Paper III, 2016

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glocalisation

Glocalisation is the adaptation of global products, services, or ideas to local tastes, languages, and cultures, captured in the slogan think global, act local. It explains how globalisation produces hybrid outcomes rather than uniform homogenisation. For UPSC it is a GS-1 society concept, useful in answers on cultural change, consumerism, and the Indian response to globalisation.

Example: McDonald's India building its menu around localised items such as the McAloo Tikki burger instead of selling only its standard global fare.

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GLOF

GLOF is the short form of glacial lake outburst flood: the sudden release of water when a moraine or ice dam holding a glacial lake fails. A warming Himalaya has multiplied glacial lakes, raising GLOF risk.

Example: the 2023 Teesta-III dam disaster in Sikkim was worsened by a GLOF from South Lhonak lake

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glory

Glory is a term of praise for great achievement, honour or splendour, often used in historical writing about past civilisations, rulers and cultural peaks. In UPSC answers it usually appears in discussions of India's ancient heritage, nationalist historiography or the rhetoric of reviving past greatness in modern politics.

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GM feed imports

GM feed imports refer to India's regulated import of genetically modified soybean meal and other feed ingredients for poultry and aquaculture. Permitted in limited quantities during domestic shortages, they remain controversial for biosafety and farmer interests. For UPSC they illustrate the GM debate's livestock dimension.

Example: The 2021 permission to import GM soymeal during a feed-price spike shows the policy's crisis use.

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GNP

GNP is the gross national product, the total value of final goods and services produced by a country's residents in a given period, wherever in the world they operate. It equals GDP plus net factor income from abroad, that is, earnings of resident workers and capital overseas minus foreign earnings within the country. It matters for UPSC because it shifts the lens from where production happens (GDP) to who earns it, and it is the parent concept from which NNP at factor cost is derived.

Example: Remittances from Indian workers in the Gulf raise India's GNP relative to GDP, since that income accrues to residents working outside the country.

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GNSS is

A Global Navigation Satellite System (GNSS) is a constellation of satellites providing positioning, navigation and timing signals worldwide. Major systems include the US GPS, Russia's GLONASS, Europe's Galileo, China's BeiDou and India's NavIC, which is a regional system. For UPSC, GNSS matters for defence, disaster management, agriculture and digital infrastructure, with NavIC as India's indigenous system.

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GNSS spoofing

GNSS spoofing is an attack in which a transmitter broadcasts fake navigation signals that overpower genuine ones, making a receiver report a false position; the DGCA directed 10-minute reporting of suspected spoofing around Delhi airport in January 2026.

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go, see, investigate, then act

Go, see, investigate, then act is a practical maxim for field-based administration and research: observe conditions first-hand, verify facts on the ground, and only then decide and act. It captures the ethic of evidence-based decision-making valued in the civil services. For UPSC (GS-4), it suits ethics answers and case studies on responsive governance, field inspection and informed leadership.

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Goa (Operation Vijay, 1961)

The complete concept is Operation Vijay, the December 1961 Indian military operation that liberated Goa, Daman, and Diu from Portuguese rule. After years of failed diplomacy, Indian forces moved on 17-18 December and secured surrender by 19 December, ending 451 years of Portuguese colonial presence. For UPSC, it illustrates post-independence territorial integration, the limits of negotiation, and India's anti-colonial foreign policy.

Example: the Portuguese governor's surrender on 19 December 1961, now celebrated as Goa Liberation Day

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Goa Foundation

The Goa Foundation is a Goa-based environmental organisation founded by environmentalist Claude Alvares, known for landmark public interest litigation on mining and environmental clearances. Its Supreme Court petitions against iron-ore mining in Goa secured a temporary mining ban and court orders mandating fresh environmental impact assessments, making it a leading example of civil society enforcing EIA law.

Example: The Goa Foundation's petitions led the Supreme Court to halt iron-ore mining in Goa and order fresh environmental clearances.

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Goa in 1510

Goa in 1510 refers to the Portuguese conquest of Goa by Afonso de Albuquerque, who seized it from the Bijapur Sultanate, lost it, and recaptured it in November 1510. It became the capital of Portugal's Estado da India and the base for its Asian empire, introducing European administration, Catholic missions, and new crops to the region. For UPSC, 1510 marks the start of European colonialism in India and 451 years of Portuguese rule in Goa.

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Goa nightclub, Arpora (2025)

The Goa nightclub fire of December 2025 in Arpora killed 25 people when a blaze swept through a crowded club with inadequate exits. It became a national case study in nightlife fire safety.

Example: the tragedy led to fire-safety audits of clubs across tourist hubs

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gobar-dhan

GOBARdhan (Galvanizing Organic Bio-Agro Resources Dhan) is a Government of India scheme that converts cattle dung and farm waste into biogas, compressed biogas and bio-fertilisers, supporting rural energy security.

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god

God is the concept of a supreme being or ultimate reality, central to theistic traditions and contested in atheistic schools. In Indian philosophy, the Nyaya and Vedanta schools affirm a creator, while Samkhya, Mimamsa and Buddhism do not. For UPSC (GS-1, philosophy; GS-4, ethics), the concept appears in questions on religion, dharma and moral reasoning.

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Godavari

The Godavari is the largest river of peninsular India, about 1,465 kilometres long, rising at Trimbakeshwar in Maharashtra and flowing east through Maharashtra, Telangana and Andhra Pradesh to the Bay of Bengal, where it forms a large delta. Called the Dakshin Ganga, its major tributaries include the Pranhita, Indravati and Manjira. It matters for UPSC because its basin, tributary order, dams and the Polavaram project are staple Prelims and Mains geography questions.

Example: The Polavaram multipurpose irrigation project on the Godavari in Andhra Pradesh, declared a national project for interlinking benefits.

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Godavarman dictionary definition

In T.N. Godavarman Thirumulpad v. Union of India (1996), the Supreme Court held that the word 'forest' in the Forest (Conservation) Act, 1980 must be understood in its dictionary sense. This meant the Act applied to all areas qualifying as forest by their ordinary meaning, irrespective of ownership or whether they were officially recorded as forest, vastly expanding the law's protective reach.

Example: After the 1996 Godavarman ruling, any land meeting the dictionary meaning of forest required central government approval for non-forest use, even if it was not a recorded forest.

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Gol Gumbaz

Gol Gumbaz is the mausoleum of Mohammed Adil Shah of Bijapur, completed around 1656, crowned by one of the largest domes in the world with a diameter of about 44 metres. Its whispering gallery carries even the faintest sound across the dome, and its Deccan style blends Islamic and indigenous elements. It matters for UPSC because it is the signature monument of the Adil Shahi dynasty and a standard Prelims identification question on Deccan Sultanate architecture.

Example: The whispering gallery inside the dome, where a whisper on one side is heard clearly on the opposite side nearly 38 metres away.

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Golaknath

Golaknath refers to I.C. Golaknath v. State of Punjab (1967), in which the Supreme Court held that Parliament cannot amend the Constitution to take away or abridge fundamental rights. The ruling, delivered against land-reform amendments, provoked Parliament into passing the 24th Amendment asserting full amending power. For UPSC, it is the first great clash in the Parliament-versus-judiciary saga over constitutional amendment.

Example: Kesavananda Bharati (1973) partly overruled Golaknath, replacing its absolute bar with the basic-structure doctrine.

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Golconda

Golconda was the famed fortress-capital of the Qutb Shahi sultanate, which ruled the Deccan from 1518 to 1687 with its seat near modern Hyderabad. Its diamond mines produced legendary stones like the Koh-i-Noor, making Golconda synonymous with fabulous wealth. The kingdom fell to Aurangzeb's siege in 1687. For UPSC, Golconda links Deccan sultanates, Mughal expansion, and India's historic diamond trade.

Example: Aurangzeb's annexation of Golconda in 1687

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Golconda — Qutb Shahis

The Qutb Shahi dynasty was a Persian-origin dynasty that ruled the Deccan from Golconda between 1518 and 1687, founded by Quli Qutb-ul-Mulk, a governor who declared independence after the Bahmani decline. Its rulers founded Hyderabad in 1591, built the Charminar, patronized Deccani and Telugu culture, and grew wealthy on the diamond trade until Aurangzeb annexed Golconda. For UPSC, it is one of the five Deccan Sultanates bridging Bahmani and Mughal rule.

Example: Aurangzeb's siege and annexation of Golconda in 1687 ended Qutb Shahi rule and absorbed the Deccan into the Mughal Empire.

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Golconda Fort

Golconda Fort is a fortified citadel near Hyderabad in Telangana, first built by the Kakatiyas and expanded by the Qutb Shahi rulers from the 16th century. It is famed for massive granite ramparts, the Fateh Darwaza gateway, its acoustic signaling system, and the diamond mines that yielded the Kohinoor. For UPSC, it exemplifies Deccan military architecture and the Qutb Shahi capital before Hyderabad was founded.

Example: The Kohinoor diamond is believed to have been mined in the Golconda region and stored in the fort before it passed to the Mughals and later the British Crown.

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gold

Gold is a precious metal valued as money, ornament, and reserve asset. India is among the world's largest consumers and importers of gold, so its imports weigh on the current account deficit, while the RBI holds gold as part of foreign exchange reserves. For UPSC it links GS-3 topics of trade, monetary policy, and household savings behaviour.

Example: The Sovereign Gold Bond scheme, launched in 2015, which offered a financial alternative to physical gold and aimed to curb gold imports.

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gold and silver coins

Gold and silver coins are the precious-metal coinages of ancient and medieval India, markers of trade, state power and metallurgy. Silver punch-marked coins (karshapana) circulated from the Mauryan age, while gold coinage expanded under the Kushans and Guptas. For UPSC (GS-1, ancient history), coinage is primary evidence of economic history, chronology and royal iconography.

Example: The silver punch-marked karshapana of the Mauryan period

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gold coins

Gold coins are high-value coinage issued by Indian rulers, most famously the Gupta dinaras, whose varied designs such as the archer, horseman and ashvamedha types document art, royal titulature and political claims. The Kushans were earlier large-scale issuers of gold coins in India. For UPSC (GS-1, ancient history), Gupta coinage is a standard art-and-culture topic.

Example: The gold dinaras of the Gupta emperor Samudragupta

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gold fanams

Gold fanams are small gold coins of South India, part of the traditional panam currency in circulation from around the 13th century. They were issued in very light weights of about 0.3 to 0.4 grams by kingdoms such as Travancore and Cochin, and they circulated widely across Kerala, Tamil Nadu, Karnataka and Sri Lanka. They matter for UPSC GS-1 questions on ancient and medieval Indian economic history and numismatics.

Example: the Vira Raya type gold fanams of the Travancore kingdom (16th to 18th century)

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gold mohur

The gold mohur is the standard gold coin of the Mughal currency system, its name coming from the Persian word muhr, meaning seal. It was first issued by Sher Shah Suri in 1540 at about 169 grains (10.95 grams), and the Mughals continued it as part of a tri-metallic coinage of gold mohur, silver rupiya and copper dam. It is a GS-1 staple for medieval Indian economic history, coinage and Mughal administration.

Example: Akbar's falcon mohur struck at Asir to commemorate the capture of Asirgarh Fort in 1601

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Gold Monetisation Scheme (GMS) is

The Gold Monetisation Scheme is a 2015 scheme that let households and institutions deposit idle gold with banks, earning interest while the government mobilized the metal to reduce gold imports and deepen the financial system. It offered short, medium and long-term deposit options, with the medium and long variants wound up in 2025. It matters because it illustrates India's attempts to monetize its vast private gold holdings, a recurring UPSC economy mains point on savings and the current account.

Example: launched November 2015 alongside Sovereign Gold Bonds

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Gold Standard

The gold standard is the monetary system under which currencies are fixed to gold and convertible into it, disciplining budgets but preventing stimulus in a slump. Countries clung to it after 1929 and deepened the Depression; leaving it was a precondition of recovery.

Example: Britain left gold in 1931, the United States in 1933.

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gold standard influenced by Roman gold coins

The Kushan gold standard is the weight system of Kushan gold coinage, derived from the Roman aureus at about 8 grams. Vima Kadphises introduced extensive gold coinage in India, inspired by Roman coins pouring in through trade, and much of the gold came from melted Roman aurei. The Guptas later adopted the same standard for their dinaras. It serves GS-1 ancient Indian economy, Indo-Roman trade and numismatics.

Example: Vima Kadphises' double dinar of about 15.8 grams, modeled on the Roman weight standard

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Golden Crescent

The Golden Crescent is the opium-producing region spanning Afghanistan, Iran and Pakistan, the source of most heroin trafficked into India. It matters because heroin proceeds fund cross-border terrorism, fusing the drug trade with the Kashmir and Punjab security threat.

Example: Afghan heroin routed through Pakistan into Punjab

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Golden Fibre (jute)

Golden Fibre is the traditional epithet for jute, whose silky golden strands made it Bengal's historic cash crop. The Golden Fibre Revolution refers to efforts to revive jute through better seeds, retting technology and diversified products. For UPSC it anchors questions on natural fibres and the jute economy.

Example: Diversified jute products like shopping bags and geo-textiles carry the Golden Fibre revival.

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Golden Quadrilateral

The Golden Quadrilateral is the 5,846-km national highway network connecting Delhi, Mumbai, Chennai and Kolkata, launched in 2001 under Atal Bihari Vajpayee as the flagship of the National Highways Development Project and executed by NHAI. By sharply cutting freight times between the four metros it knitted India into a single market. For UPSC, it is the landmark case of infrastructure-led growth.

Example: The Delhi-Mumbai stretch cut truck travel time dramatically, demonstrating logistics-led growth in action.

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Golden Rice

Golden Rice is a genetically engineered variety of rice enriched with beta-carotene, a precursor of vitamin A, giving the grains their characteristic golden colour. Developed as a humanitarian project by scientists Ingo Potrykus and Peter Beyer to combat vitamin A deficiency, which causes blindness and mortality among children in developing countries, it remains one of the most debated GM crops.

Example: The Philippines approved Golden Rice for commercial cultivation in 2021, becoming the first country to do so.

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golden triangle

The golden triangle is Articles 14, 19 and 21 read together as one integrated guarantee, which Maneka Gandhi v. Union of India (1978) held must all be satisfied by any law touching personal liberty: arbitrary procedure fails Article 14, unreasonable fails Article 19, unfair fails Article 21. The metaphor marks Article 21's growth from mere enacted procedure into substantive due process. It has nothing to do with the drug-trade Golden Triangle of Southeast Asia.

Example: Maneka Gandhi v. Union of India (1978), which fused equality, freedoms and life into a single test for state action.

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Goleman

Daniel Goleman is an American psychologist who popularized the concept of emotional intelligence with his 1995 book Emotional Intelligence, arguing that self-awareness, self-regulation, motivation, empathy, and social skills matter as much as IQ for success. His framework divides emotional intelligence into personal and social competencies. For UPSC, he is the foundational reference for the emotional-intelligence module of GS Paper IV on ethics and aptitude.

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Golkonda fort

Golkonda is an alternate spelling of Golconda, the hill fortress near Hyderabad in Telangana that served as the capital of the Qutb Shahi dynasty from the 16th century. Its vast outer walls, eight monumental gateways, granaries, mosques, and the famed Fateh Darwaza reflect Deccan defensive engineering at its peak. For UPSC, it is asked in art and culture and medieval history as a symbol of Qutb Shahi power and the diamond trade.

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Gomdhar Konwar

Gomdhar Konwar was an Ahom prince who led the first anti-British uprising in Assam in 1828, after the East India Company broke its pledge to withdraw following the First Anglo-Burmese War of 1824 to 1826. Enthroned near Jorhat, he attacked the British fort at Rangpur but was defeated, captured, and sentenced to exile. For UPSC, his revolt marks the beginning of organized resistance to colonial rule in the Northeast.

Example: The 1828 Ahom rebellion near Jorhat, after which the British restored Upper Assam to Maharaja Purandar Singha in 1833.

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Gond

The Gonds are one of the largest tribal communities of India, concentrated in the Gondwana region across Madhya Pradesh, Chhattisgarh, Maharashtra, and Odisha. They speak Gondi, a Dravidian language, and historically built powerful kingdoms such as Garha-Katanga. Their painting, music, and festivals like Keslapur Jatra reflect a distinct cultural identity. For UPSC, they are central to tribal welfare, Fifth Schedule areas, and PESA implementation.

Example: The Gond kingdom of Garha-Katanga under Rani Durgavati, who resisted Mughal expansion and died in battle in 1564.

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Gondophares

Gondophares was the founder of the Indo-Parthian kingdom in northwestern India in the 1st century CE, ruling from Taxila between about 19 and 46 CE. His coins blend Greek and Indian motifs and show his authority over Gandhara and Punjab. Christian tradition links him to the mission of St. Thomas the Apostle in India. For UPSC, he represents the Indo-Parthian phase between the Indo-Greeks and the Kushanas.

Example: His silver tetradrachms struck at Taxila with Greek legends are the primary evidence of Indo-Parthian rule.

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Gondophernes

Gondophernes is an alternate spelling of Gondophares, the 1st-century CE founder of the Indo-Parthian kingdom who ruled from Taxila between about 19 and 46 CE. His reign over Gandhara and Punjab is known chiefly from coins carrying Greek legends and Indian symbols. Tradition associates him with St. Thomas's mission to India. For UPSC, the name appears in ancient history as the Indo-Parthian link between Indo-Greek and Kushana rule.

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Gondwana

Gondwana is the historic homeland of the Gond tribes across central India, spanning parts of Madhya Pradesh, Chhattisgarh, Maharashtra, and Odisha, where powerful Gond kingdoms like Garha-Katanga flourished before Mughal and British annexation. The name also denotes Gondwanaland, the ancient southern supercontinent of plate-tectonic theory. For UPSC, it connects tribal history and Fifth Schedule geography with the physical geography of the Indian plate.

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Good Governance Index

The Good Governance Index is the Department of Administrative Reforms and Public Grievances' framework for ranking states and UTs on governance outcomes. Launched on Good Governance Day, 25 December 2019, it scores ten sectors from agriculture and public health to citizen-centric governance, grouping states as big, north-eastern and hill, and UTs. For UPSC, it is the Centre's flagship attempt at competitive federalism in administration.

Example: Tamil Nadu topped the big-states ranking in the 2019 edition, while Gujarat led the 2021 edition.

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Goods and Services Tax

The Goods and Services Tax is India's comprehensive destination-based indirect tax, subsuming excise duty, service tax, VAT, and other levies into one system. Introduced by the 101st Constitutional Amendment in 2016 through Articles 246A, 269A, and 279A, it applies CGST plus SGST on intra-state supply and IGST on inter-state supply, with rates set by the GST Council. Example: the GST Council's decisions on tax slabs illustrate cooperative federalism in action.

Example: The GST Council's periodic decisions fixing tax slabs and rates for goods and services across states.

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Goods and Services Tax is

The Goods and Services Tax is India's unified indirect tax, launched on 1 July 2017 through the 101st Constitutional Amendment, replacing central excise, service tax and state VATs with a destination-based dual levy of CGST plus SGST, and IGST on inter-state trade. The GST Council under Article 279A governs rates and rules. It matters because it reshaped fiscal federalism, logistics and formalization, and remains among the most tested UPSC economy topics in both prelims and mains.

Example: launched 1 July 2017

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Gopal Ganesh Agarkar's Sudharak

Sudharak, meaning Reformer, was the bilingual Marathi and English weekly founded by Gopal Ganesh Agarkar in Pune in 1888 after he resigned as editor of Tilak's Kesari over the primacy of social reform. It campaigned for rationalism, individual freedom, women's rights, and the abolition of caste, child marriage, and enforced widowhood. For UPSC, it is a key source on the social-reform versus political-freedom debate within the national movement.

Example: Agarkar used Sudharak to attack child marriage and the forced tonsure of widows in 19th-century Maharashtra.

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Gopal Krishna Gokhale

Gopal Krishna Gokhale (1866 to 1915) was a moderate nationalist leader, founder of the Servants of India Society in 1905, and a respected economic critic of British rule. A member of the Imperial Legislative Council, he pursued constitutional reform through petitions and legislative work. For UPSC, Gokhale matters as Gandhi's acknowledged political guru and as the symbol of the moderate phase of the freedom movement.

Example: His Servants of India Society, founded in 1905, trained volunteers for national service, education, and famine relief work.

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Gopala I

Gopala I was the founder of the Pala dynasty of Bengal, elected by regional chieftains around 750 CE to end the century of anarchy called matsya-nyaya that followed the fall of Shashanka's kingdom. His election, recorded on the Khalimpur copper plate, is a rare early-medieval example of elective kingship in India. A Buddhist, he laid the base for Pala power in Bengal and Bihar. For UPSC, he anchors Pala chronology and the elective-monarchy question.

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Gopi Thotakura

Gopi Thotakura is the pilot who flew aboard Blue Origin's NS-25 mission in May 2024, becoming the first Indian space tourist and the second Indian in space after Rakesh Sharma.

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gopuram

A gopuram is the tall, ornate gateway tower of a Dravidian-style Hindu temple. Built as a pyramidal, multi-storeyed structure with receding tiers covered in painted stucco sculptures of gods, goddesses and mythological scenes, it marks the temple entrance and the transition from the mundane world to the sacred. It is central to GS-1 questions on temple architecture and South Indian art.

Example: the southern tower of the Meenakshi Temple at Madurai, about 170 feet tall and one of its 14 gopurams

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gopurams

Gopurams are the monumental gateway towers of Dravidian temples, the plural form of gopuram. These pyramidal towers often dominate the temple skyline with richly sculpted tiers, and they reached their grandest expression under the Vijayanagara and Nayaka rulers after the earlier Pallava and Chola periods. For UPSC GS-1, their growth marks the shift from vimana-centric to gopuram-centric Dravidian architecture.

Example: the 14 gopurams of the Meenakshi Temple at Madurai, the tallest rising to about 170 feet

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Gopurams on all four sides

Gopurams on all four sides describes temple complexes entered through tall ornate gateway towers on the north, south, east, and west, a layout typical of mature Dravida and Vijayanagara temples. The gopuram, usually the tallest element, dwarfs the inner vimana and marks the ritual approach through successive walled enclosures. For UPSC art and culture, it is a marker feature for identifying later Chola and Vijayanagara temples in map and architecture questions.

Example: The Meenakshi temple at Madurai has towering gopurams on all four sides of its sprawling complex.

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gorges

A gorge is a deep, narrow valley with steep sides, cut by a river eroding vertically through resistant rock. It forms in the youthful stage of the fluvial cycle, when a fast-flowing river deepens its channel faster than the valley can widen. Gorges belong to GS-1 physical geography, appearing in questions on river landforms and drainage mapping.

Example: the deep gorge cut by the Indus in the Ladakh region

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gorges and canyons

Gorges and canyons are both deep valleys carved by rivers, but they differ in shape and setting. A canyon is wider with step-like sides, typically cut into horizontal sedimentary rock in arid regions, while a gorge is narrower and V-shaped, carved through resistant rock. The distinction rests on width, climate and rock type rather than depth. Both are core to GS-1 fluvial landforms.

Example: the Grand Canyon of the Colorado River in the USA, the classic textbook canyon

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Gosikhurd project

The Gosikhurd project is the national irrigation project on the Wainganga river in Maharashtra's Vidarbha region, conceived in the 1980s and repeatedly delayed. Meant to irrigate over 2.5 lakh hectares in chronically distressed Vidarbha, its slow progress became a symbol of irrigation-project delays. For UPSC it illustrates the cost of time overruns in public irrigation.

Example: Its command in Bhandara and Chandrapur districts was promised relief from Vidarbha's rainfed vulnerability.

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Gothenburg Protocol

The Gothenburg Protocol is a 1999 protocol to the 1979 Geneva Convention on Long-range Transboundary Air Pollution that tackles acidification, eutrophication and ground-level ozone. It sets national emission ceilings for sulphur dioxide, nitrogen oxides, volatile organic compounds and ammonia, and was amended in 2012 to cover fine particulate matter (PM2.5) and black carbon.

Example: The Protocol is a regional agreement under the UN Economic Commission for Europe, and India is not a party to it.

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gotra

Gotra is the exogamous patrilineal clan system of Hindu society, in which a person inherits the gotra of the father and marriage within the same gotra is traditionally prohibited. The principal gotras trace descent from the Vedic sages, the Saptarishis, and the system is recorded in the dharmashastra literature. It features in GS-1 questions on ancient Indian society, kinship and social institutions.

Example: the Kashyapa gotra, one of the principal gotras of the Vedic tradition

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GovAI

GovAI, or governance with AI, is the use of artificial intelligence inside the state: for data-driven policy making, automation of public processes, personalised citizen services, predictive analytics and scheme monitoring. Indian examples include GSTN's AI fraud detection, MyGov's scheme chatbots and IMD's AI cyclone prediction.

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governance

Governance refers to the structures, rules, and processes through which decisions are made, implemented, and overseen, covering both how governments manage public affairs and how organisations regulate themselves. In the technology context, it means the policies, standards, and accountability mechanisms that keep new systems safe, fair, and transparent. Good governance balances innovation with responsibility, so that harms are prevented without blocking progress.

Example: The European Union's AI Act (2024), the world's first comprehensive law on artificial intelligence, uses a risk-based framework to govern AI systems.

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Governance Act

Governance Act is the bolded fragment of the proposed National e-Governance Act, a long-demanded law that would make digital delivery of public services a mandatory right rather than an administrative choice. In the spirit of the Second Administrative Reforms Commission's push for business-process re-engineering before digitisation, reformers argue such a law is needed, but it has never been enacted. For UPSC, it captures the gap between Digital India ambition and legal entitlement.

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Governance deficit

Governance deficit is the absence or poor quality of state services, administration and justice in remote areas, leaving a vacuum that insurgents fill. In LWE zones it shows up as absentee officials, non-functional schools and unresponsive policing. It matters because insurgency thrives where the state is invisible.

Example: Interior Bastar villages with no resident administration

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Governance deficits

Governance deficits are the failures of administration, service delivery and justice that alienate border populations and give insurgents a governance pitch. In the North-East they show up as corruption, stalled projects and unresponsive policing. Counter-insurgency doctrine treats closing these gaps as essential as operations.

Example: Stalled development projects in insurgency-hit Manipur districts

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Governing Council

The Governing Council is the apex decision-making body of NITI Aayog, comprising the Prime Minister as chairperson, all Chief Ministers, and the Lieutenant Governors of Union Territories. It embodies cooperative federalism by giving states a direct voice in national policy formulation. For UPSC, it is the key contrast point with the Planning Commission's National Development Council and illustrates the shift from centralized to participatory planning.

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governing laws

In UPSC answers, 'governing laws' means the set of statutes, rules and constitutional provisions that regulate a particular sector or activity. They define the powers, duties, procedures and limits that bind both the state and citizens, and they are interpreted by courts when disputes arise. The phrase is most useful in GS-2 and GS-3 answers on regulation, governance and economic policy.

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government control over universities

Government control over universities refers to the regulation of higher education by the state through bodies like the UGC and the AICTE, along with funding conditions. It covers appointments of vice-chancellors, curricula, admissions and grants, and it raises the continuing debate between academic freedom and public accountability. It appears in GS-2 questions on education policy, institutional autonomy and higher education governance.

Example: the University Grants Commission, set up under the UGC Act of 1956

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Government of India Act

Government of India Act is the generic title of the landmark British statutes of 1858, 1909, 1919, and 1935 that progressively reorganized colonial administration and transferred limited power to Indians. Each act widened representation, from Crown rule in 1858 to provincial autonomy in 1935. For UPSC, these acts form the constitutional lineage of the Indian Constitution's parliamentary and federal features and are central to modern history mains answers.

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Government of India Act 1858

The Government of India Act 1858 was the statute that ended East India Company rule after the Revolt of 1857, transferring administration directly to the British Crown. It created the office of Secretary of State for India, advised by a 15-member Council of India, and made the Governor-General the Viceroy. It matters for UPSC because it inaugurated the era of direct British rule (the Raj) and is the starting point of the sequence of constitutional reforms tested in every Indian polity paper.

Example: Lord Canning becoming the first Viceroy of India in 1858, with Queen Victoria's Proclamation announcing the transfer of power.

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Government of India Act 1919

The Government of India Act 1919, based on the Montagu-Chelmsford Report, introduced dyarchy in the provinces by dividing subjects into reserved and transferred categories, and created a bicameral central legislature with a limited elected Indian majority. It extended separate electorates and declared responsible government a gradual goal. For UPSC, it is the pivot between the Morley-Minto reforms and provincial autonomy, and a staple of constitutional-development questions.

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Government of India Act 1935

The Government of India Act 1935 is the longest British statute applied to India, introducing provincial autonomy, dyarchy at the Centre, a proposed All-India Federation, the Federal Court, and three legislative lists with residuary powers vested in the Governor-General. It also separated Burma from India. It matters for UPSC because its structure, federal scheme and lists were adapted wholesale into the 1950 Constitution, and it governed India as the interim constitution from 1947 to 1950.

Example: The 1937 provincial elections, in which Congress ministries took office in eight provinces under the Act's provincial autonomy provisions.

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Government of India Act of 1858

The Government of India Act of 1858 transferred power from the East India Company to the British Crown after the Revolt of 1857, creating the offices of Secretary of State for India and the Viceroy, who replaced the Governor-General. It ended Company rule, proclaimed non-interference in religion, and promised Indians admission to public service. For UPSC, it marks the start of direct British rule and the constitutional baseline for all later Government of India Acts.

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Government of India Act, 1919

The Government of India Act, 1919, known as the Montagu-Chelmsford Reforms, was the British statute that introduced dyarchy, dividing provincial subjects into reserved and transferred categories, with transferred subjects run by Indian ministers responsible to the legislature. It also created a bicameral Central legislature. For UPSC, it is the first real experiment in responsible government, whose failures fed directly into the Simon Commission and the 1935 Act.

Example: Dyarchy's breakdown, as ministers handled nation-building subjects without control over finance, became the standard nationalist critique of the Act.

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Government of India Act, 1935

The Government of India Act, 1935 was the longest British enactment for India, introducing provincial autonomy, an all-India federation proposal, dyarchy at the Centre, and new institutions including the Reserve Bank, the Federal Court and provincial public service commissions. Though never fully implemented, roughly two-thirds of its provisions were adapted into the Indian Constitution.

Example: its federal scheme directly shaped the Seventh Schedule's division of legislative subjects

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government of the people, by the people, for the people

Government of the people, by the people, for the people is Abraham Lincoln's definition of democracy from the Gettysburg Address of 1863, dedicating a Civil War cemetery. It remains the most quoted single sentence on popular government. The essay uses it as the democratic ideal against which leaders and institutions are measured.

Example: Lincoln's 1863 Gettysburg definition of democracy as government of, by and for the people.

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Government Resolution of 1913

The Government Resolution on Education Policy of February 1913 was the British response to Gokhale's demand for compulsory primary education, which was rejected as unaffordable. It promised grants for the widest extension of voluntary primary schooling, practical curricula, trained teachers, subsidies for maktabs and pathshalas, and higher standards rather than more institutions. For UPSC, it marks the first systematic colonial education policy and the limits of British welfare commitment.

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government securities

Government securities are tradable debt instruments issued by the Central or State governments to borrow from the public. They include Treasury Bills for the short term and dated securities for the long term, and they are considered risk-free because they carry a sovereign guarantee. Managed by the RBI through auctions, they matter for GS-3 topics on public debt, fiscal policy and financial markets.

Example: the 364-day Treasury Bill issued by the Government of India

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government securities (g-secs)

G-Secs, short for government securities, are the tradable debt instruments issued by the Central and State governments to finance the fiscal deficit. They include Treasury Bills, dated securities and State Development Loans, and they are treated as risk-free gilt-edged instruments backed by the sovereign. For UPSC GS-3, they connect public borrowing, RBI monetary operations and bond markets.

Example: State Development Loans, the G-Secs issued by state governments through RBI auctions

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government-in-exile in Calcutta

A government-in-exile in Calcutta is the Provisional Government of Bangladesh, also called the Mujibnagar Government, which functioned from 8 Theatre Road in Calcutta during the 1971 Bangladesh Liberation War. Sworn in at Baidyanathtala on 17 April 1971, with Tajuddin Ahmad as prime minister and Syed Nazrul Islam as acting president, it coordinated the Mukti Bahini and ran foreign missions. It is important for GS-1 modern history on the 1971 war and India-Bangladesh relations.

Example: the oath-taking ceremony of the Mujibnagar Government at Baidyanathtala on 17 April 1971

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government/approval route

The government or approval route is one of the two channels for foreign direct investment into India, the other being the automatic route. Under this route, the foreign investor must obtain prior government approval, processed through the Foreign Investment Facilitation Portal, and it applies to sensitive sectors. It is central to GS-3 questions on FDI policy, the investment climate and economic liberalisation.

Example: FDI in the defence sector beyond 74 per cent, which requires government approval

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governmental in nature

In UPSC and legal answers, 'governmental in nature' describes an action, body or function that is essentially part of the state rather than private activity, covering sovereign functions such as policing, taxation and defence. The phrase matters in GS-2 for interpreting Article 12's definition of 'the State' and for deciding when a body is bound by fundamental rights. It also appears in debates on privatisation.

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Governor

The Governor is the constitutional head of a state under Articles 153 to 162, appointed by the President and holding office during the President's pleasure under Article 156. The office combines ceremonial duties with crucial discretionary powers, such as inviting a party to form government, reserving bills for the President and recommending President's Rule. It matters for UPSC because Governor-state government conflicts are a perennial Mains theme, shaped by the Sarkaria Commission and the B.P. Singhal judgment of 2010.

Example: The B.P. Singhal v. Union of India judgment of 2010, which held that Governors cannot be removed merely for ideological differences with the Centre.

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Governor-General

The Governor-General was the chief executive of British India: the office was created by the Regulating Act of 1773 (Warren Hastings, Governor-General of Bengal), restyled Governor-General of India in 1833 (William Bentinck), and replaced by the Viceroy after Crown rule began in 1858. C. Rajagopalachari (1948-50) was the last holder. For UPSC, the office traces the constitutional evolution of colonial rule.

Example: The Regulating Act of 1773 made Warren Hastings the first Governor-General of Bengal.

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Governor-General of Bengal

The Governor-General of Bengal was the office created by the Regulating Act of 1773 as the head of the Bengal Presidency, with supervisory authority over the Bombay and Madras presidencies. Its first holder was Warren Hastings, who served from 1773 to 1785. For UPSC, it represents the first step toward centralized colonial administration and the starting point of the Governor-General lineage that culminated in the Viceroy.

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Governor-General of Bengal (Warren Hastings)

Warren Hastings served as the first Governor-General of Bengal from 1773 to 1785 under the Regulating Act. He consolidated Company rule through revenue and judicial reforms, including the establishment of district courts and the Sadar Diwani Adalat. His later impeachment in Britain over the Rohilla War and the treatment of the Begums of Oudh became a landmark debate on colonial accountability. For UPSC, his tenure defines the Regulating Act era of British governance.

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Governor-General of India

The Governor-General of India was the office created by the Charter Act of 1833, upgrading the Governor-General of Bengal into an all-India head with complete control over civil, military, and legislative matters. Its first holder was William Bentinck. For UPSC, the 1833 change marks legislative centralization, making British India a unitary state under the Company and ending the presidencies' lawmaking autonomy.

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Governor-General of India (William Bentinck)

William Bentinck served as the first Governor-General of India from 1828 to 1835. His tenure is remembered for liberal reforms: the abolition of sati in 1829, the suppression of thuggee under William Sleeman, English education through Macaulay's Minute, and administrative and financial retrenchment. For UPSC, Bentinck embodies the reformist phase of Company rule and is central to questions on social legislation and the anglicist-orientalist debate.

Example: The Bengal Sati Regulation of 1829, which criminalized sati, enacted during Bentinck's tenure.

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Governors

In the UPSC context, Governors are the constitutional heads of Indian states under Articles 153 to 162, appointed by the President and holding office during the President's pleasure. They act on ministerial advice but retain discretionary powers, such as inviting a government after fractured verdicts and reserving bills for the President's consideration. For UPSC, Centre-state relations, Article 356, and discretionary powers make Governors a perennial prelims and mains topic.

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Govind Ballabh Pant

Govind Ballabh Pant was the first Premier (later Chief Minister) of the United Provinces, serving 1937-39 and 1946-54, and Union Home Minister from 1955 until his death in 1961. A key Congress leader from Uttarakhand, he oversaw land reforms in UP and the reorganisation of states as Home Minister. He matters for UPSC because he bridges the freedom struggle, state administration and Centre-state relations, and was awarded the Bharat Ratna in 1957.

Example: His tenure as Union Home Minister during the linguistic reorganisation of states under the States Reorganisation Act of 1956.

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Govind Ballabh Pant Committee

The Govind Ballabh Pant Committee is the colloquial name for the Committee of Parliament on Official Language constituted in 1957 under Article 344(4) and chaired by Home Minister Govind Ballabh Pant. It examined the B.G. Kher Official Language Commission's report and, reporting in 1959, favoured continuing English alongside Hindi for official purposes. For UPSC, it is the bridge between the Kher Commission and the Official Languages Act, 1963.

Example: Its view that English should continue after 1965 shaped the compromise eventually codified in the 1963 Act and its 1967 amendment.

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Govinda III

Govinda III was the Rashtrakuta emperor (roughly 793 to 814 CE) who carried Rashtrakuta power to its greatest northern extent during the tripartite struggle. His campaigns defeated the Gurjara-Pratihara king Nagabhatta II and the Pala king Dharmapala, making the Rashtrakutas the dominant power of early ninth century India. He matters for UPSC because his reign marks the high point of Rashtrakuta imperialism and anchors questions on the Kannauj-centred triangular contest.

Example: The Sanjan copper plate inscription, which records Govinda III's northern campaigns and his defeat of the Pratihara and Pala kings.

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graded inequality

Graded inequality is B.R. Ambedkar's concept that the caste system is not simple inequality but a hierarchy of ascending and descending grades, in which each caste has someone below it to look down upon. This structure prevents unified resistance, since every group is simultaneously oppressed and oppressor. It comes from Annihilation of Caste and is central to GS-1 society and GS-4 thinkers.

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Graded Response Action Plan (GRAP)

GRAP is an emergency air-pollution control framework for Delhi-NCR, notified under the Environment (Protection) Act and enforced by the Commission for Air Quality Management. It triggers escalating restrictions as the Air Quality Index worsens across four stages: Stage I (Poor, AQI 201-300), Stage II (Very Poor, AQI 301-400), Stage III (Severe, AQI 401-450) and Stage IV (Severe Plus, AQI above 450). Measures range from banning open waste burning and dust-generating construction in Stage I to halting construction activity, restricting diesel vehicles and closing schools in Stage IV.

Example: GRAP Stage IV emergency measures, including a ban on construction and restrictions on polluting trucks, are routinely invoked in Delhi when AQI crosses 450 during winter smog episodes.

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gradual development of responsible government

The gradual development of responsible government is the declared objective of the preamble to the Government of India Act, 1919. It held that self-governing institutions should develop progressively, with Indians increasingly associated with every branch of administration, while Parliament alone would judge the time and manner of each advance. It anchors GS-1 and GS-2 answers on the Montagu-Chelmsford reforms and constitutional development.

Example: the Montagu Declaration of 20 August 1917, whose text the 1919 Act's preamble reproduced

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graft-versus-host disease (gvhd)

Graft-versus-host disease (GVHD) is a condition in which transplanted donor stem cells recognise the recipient's body as foreign and attack it, causing skin rash, diarrhoea and liver damage.

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Grahavarman

Grahavarman was the Maukhari king of Kannauj in the early 7th century CE, married to Rajyashri, the sister of Harshavardhana. He was killed by Shashanka of Gauda, an ally of the Later Guptas, an event that provoked Harshavardhana's campaign of revenge and his rise to imperial power. For UPSC, Grahavarman's death is the hinge event linking the Maukhari, Pushyabhuti, and Gauda kingdoms in post-Gupta political history.

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Gram Nyayalayas Act 2008

The Gram Nyayalayas Act, 2008 provides for mobile village courts, presided over by a Nyayadhikari, to bring speedy justice to the rural doorstep. Gram Nyayalayas try specified criminal cases and civil suits of limited value, and are expected to dispose of cases within six months of institution. For UPSC, they are the grassroots tier of the access-to-justice architecture.

Example: Madhya Pradesh and Rajasthan were early movers in notifying Gram Nyayalayas, though coverage remains far short of the Act's one-per-panchayat vision.

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Gram Panchayat

A Gram Panchayat is the village-level institution of the Panchayati Raj system, constitutionally mandated by the 73rd Amendment for a village or group of villages. Headed by a directly elected Sarpanch, it handles local functions from sanitation and drinking water to implementing schemes like MGNREGA. For UPSC, it is the foundational unit of grassroots democracy and the third tier of federalism.

Example: India has over 2.5 lakh Gram Panchayats, making them the largest elected local-government layer in the world.

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Gram Sabha

The Gram Sabha is the assembly of all persons registered as voters within a village panchayat's area, recognized as the foundation of Panchayati Raj by the 73rd Constitutional Amendment under Article 243. It approves development plans, audits panchayat accounts, and selects beneficiaries for welfare schemes. For UPSC, it is the basic unit of grassroots democracy and the mechanism through which participatory governance and social audit operate.

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Gram Sabhas

Gram Sabhas are the assemblies of all registered voters of a village within a Panchayat area, the deliberative base of the Panchayati Raj system. They approve village plans, audit Panchayat expenditure and, under laws like the Forest Rights Act and PESA, give binding consent on land acquisition and resource decisions. For UPSC, the Gram Sabha is where participatory democracy meets tribal self-governance.

Example: Gram Sabha consent is mandatory before forest land can be diverted for projects, a power repeatedly asserted in conflicts over mining.

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Gramdan

Gramdan, meaning village gift, was Vinoba Bhave's movement from 1957 onward that extended the Bhoodan land-gift campaign by asking entire villages to pool their land for common ownership and cultivation. It offered a nonviolent, voluntary path to land redistribution and village self-rule. For UPSC, Gramdan represents the Sarvodaya response to land inequality and a moral contrast to legislative land reforms.

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Grameen Bank

Grameen Bank is the microcredit institution founded by Muhammad Yunus in Bangladesh in 1983, lending small collateral-free loans mainly to poor rural women through group-based peer accountability. Its model demonstrated that the poor are creditworthy and was replicated across the world. For UPSC, it is the canonical case study for financial inclusion, self-help group bank linkage, and social entrepreneurship in GS Paper III and IV.

Example: Muhammad Yunus and Grameen Bank received the 2006 Nobel Peace Prize for their work on microcredit.

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Gramin Bhandaran Yojana

The Gramin Bhandaran Yojana is the rural-godown scheme that subsidises construction of scientific storage at the village level, reducing distress sales at harvest. It offers capital subsidy to farmers, FPOs and cooperatives for building godowns near farms. For UPSC it is the decentralised-storage answer to the mandi glut.

Example: A farmer group in Bihar that built a rural godown under the scheme now stores paddy and sells months later at better prices.

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grammar

Grammar is the system of rules governing a language's structure, covering sounds, word formation, and sentence construction. In the Indian tradition it reaches its summit in Panini's Ashtadhyayi (circa 4th century BCE), which formalised Sanskrit morphology and syntax with remarkable precision. It matters for GS-1 ancient history and art-culture as evidence of early Indian linguistic science.

Example: Panini's Ashtadhyayi, composed of nearly four thousand sutras that generate correct Sanskrit forms through a rule-based system.

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Grand domes and pointed arches

In UPSC art and culture, grand domes and pointed arches describe signature features of Indo-Islamic architecture: the true dome raised on squinches or pendentives, and the pointed arch that replaced the trabeate lintel. Introduced under the Delhi Sultanate and perfected by the Mughals, they made possible vast prayer halls, tombs, and audience chambers. Recognizing them helps distinguish Sultanate, Mughal, and provincial styles in prelims questions.

Example: The Taj Mahal's massive double dome raised on a high drum with pointed-arched facades.

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Grand Trunk Road

The Grand Trunk Road is the historic highway running from Sonargaon in Bengal to Peshawar, rebuilt by Sher Shah Suri in the 16th century as the Sadak-e-Azam with sarais, shade trees, wells, and kos minars, and later extended by the Mughals and the British. It unified trade, administration, and military movement across northern India. For UPSC, it illustrates pre-modern infrastructure and Sher Shah's administrative genius.

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Grantha script

Grantha is the South Indian script developed under the Pallavas from the sixth century CE to write Sanskrit, written left to right and distinct from the Tamil script used alongside it for Tamil. It became the ancestor of the modern Tamil, Malayalam and Sinhala scripts and spread to Southeast Asia. It matters for UPSC because it links Pallava epigraphy, the transmission of Sanskrit culture to Southeast Asia, and questions on the evolution of Indian scripts.

Example: Pallava-period Sanskrit inscriptions, such as those at Mamallapuram, engraved in Grantha alongside Tamil-script Tamil texts.

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grants-in-aid

Grants-in-aid are non-repayable financial transfers from the Union government to the states, made on the recommendation of the Finance Commission. Article 275 of the Constitution provides for such grants, which help poorer states meet revenue needs and promote balanced regional development. They are a recurring GS-2 topic on fiscal federalism and Centre-State financial relations.

Example: the revenue-deficit grants recommended by the Fifteenth Finance Commission to states

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Granville Austin

Granville Austin was an American historian of the Indian Constitution, author of The Indian Constitution: Cornerstone of a Nation and Working a Democratic Constitution. He described the Constitution as a vehicle for social revolution and analyzed the interplay of its parliamentary, federal, and fundamental-rights provisions. For UPSC, his interpretations are standard citations for mains answers on constitutional philosophy and the framers' intentions.

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Graphene

Graphene is a single-atom-thick sheet of carbon atoms arranged in a hexagonal honeycomb lattice. Isolated in 2004 by Andre Geim and Konstantin Novoselov (Nobel Prize in Physics, 2010), it is among the strongest materials known, an excellent conductor of heat and electricity, nearly transparent and highly flexible. Its potential uses span faster electronics, stronger composite materials, better batteries and supercapacitors, and sensitive chemical sensors.

Example: Graphene-based conductive inks and graphene-enhanced lithium batteries are among the first commercial applications moving from laboratories to markets.

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GRATK Treaty

The WIPO treaty on intellectual property, genetic resources and associated traditional knowledge, concluded in May 2024, which requires patent applicants whose inventions are based on genetic resources to disclose the resources' country of origin and, for associated traditional knowledge, the Indigenous Peoples or local community that provided it.

Example: India championed the GRATK Treaty as a treaty-level check on biopiracy of resources such as neem and turmeric.

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graveyard orbits

A graveyard orbit is a disposal orbit located a few hundred kilometres above the geostationary belt, where satellites are pushed at the end of their working life. Parking dead satellites there keeps them from drifting back into the crowded geostationary ring and colliding with active spacecraft. It is one of the standard space-debris mitigation practices recommended internationally.

Example: Operators typically raise a retired geostationary satellite about 300 km above the GEO belt into a graveyard orbit when it is decommissioned.

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gravitational waves

Gravitational waves are ripples in the fabric of spacetime produced when very massive objects, such as merging black holes or neutron stars, accelerate violently. Predicted by Einstein's general theory of relativity, they travel at the speed of light and stretch and squeeze everything they pass through. Their detection opened a completely new way of observing cosmic events that give off no light.

Example: LIGO's first detection in 2015, from the merger of two black holes about 1.3 billion light years away, earned the 2017 Nobel Prize in Physics.

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gravity tractor

A gravity tractor is a proposed planetary-defence technique in which a spacecraft hovers near a dangerous asteroid for years, using its own tiny gravitational pull to tug the asteroid gradually onto a safer path. It needs no physical contact or explosives, so it avoids breaking the asteroid into pieces. The method is slow and works best on smaller asteroids that are detected well in advance.

Example: It is studied as a gentler alternative to kinetic-impactor missions such as NASA's DART, which struck the asteroid Dimorphos in 2022.

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grazing food chain

The grazing food chain is the food chain that starts with living green plants (producers) and passes energy upward through herbivores to carnivores. It is the main channel of energy flow in grasslands and many other ecosystems, where plant growth supports grazers and the predators that feed on them. It is distinguished from the detritus food chain, which begins with dead organic matter rather than living plants.

Example: Grass to grasshopper to frog to snake to eagle is a classic grazing food chain.

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Great Australian Desert

The Great Australian Desert is not a single desert but the arid interior of Australia, comprising the Great Victoria, Great Sandy, Gibson, Tanami, and Simpson deserts. It covers roughly a third of the continent, with extreme heat, sparse rainfall, and ancient red sandstone landscapes. For UPSC, it is relevant to world physical geography, desert formation in subtropical high-pressure zones, and Australia's mining economy.

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Great Bath

The Great Bath is the watertight rectangular tank at Mohenjo-daro, about 12 by 7 meters, lined with bitumen and surrounded by colonnades and changing rooms. Built around 2500 BCE, it is the earliest known public water tank in the world and likely served ritual bathing. For UPSC, it is the flagship evidence of Harappan town planning, hydraulic engineering, and organized civic life.

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Great Bengal Famine of 1770

The Great Bengal Famine of 1770 devastated Bengal, Bihar, and Odisha, killing an estimated 10 million people, about a third of the population. A drought combined with the East India Company's harsh revenue extraction and grain hoarding turned scarcity into catastrophe. For UPSC, it is the classic case of colonial economic exploitation and the administrative failure of the dual government system.

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Great Calcutta Killings

The Great Calcutta Killings were the communal riots of August 1946 in Calcutta, triggered by the Muslim League's Direct Action Day on 16 August demanding Pakistan. Three days of violence killed thousands and deepened the Hindu-Muslim divide. For UPSC, they mark the point at which partition became practically inevitable and the breakdown of the Cabinet Mission plan.

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Great Depression

The Great Depression is the severe worldwide economic downturn of 1929 to 1939, triggered by the US stock market crash of October 1929 and deepened by bank failures, collapsing demand and protectionist tariffs. It produced mass unemployment and the policy revolution of Keynesian economics and Roosevelt's New Deal. It matters for UPSC because it explains interwar instability, the rise of fascism and the abandonment of the gold standard, and it is the benchmark for every subsequent global recession.

Example: The US Smoot-Hawley Tariff Act of 1930, which raised American duties and deepened the global collapse in trade.

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Great Depression (1929)

The Great Depression is the worldwide economic collapse that began with the Wall Street Crash of October 1929 and lasted through the 1930s, marked by bank failures, deflation, mass unemployment and a collapse of world trade.

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Great Game

The Great Game is the 19th-century Anglo-Russian rivalry for influence in Central Asia and Afghanistan, played through spies, subsidies and buffer states. It frames the diplomacy of the north-west frontier inherited by British India.

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Great Green Wall

The Great Green Wall is an African Union-led initiative, launched in 2007, to combat desertification and land degradation across the Sahel. It aims to restore a mosaic of forests, farmland and pasture across 8,000 km from Dakar (Senegal) to Djibouti, with a target of 100 million hectares restored by 2030. Beyond ecology, it is framed as a climate-adaptation, food-security and jobs programme for one of the world's most vulnerable regions.

Example: Countries such as Senegal and Ethiopia have reported millions of hectares of degraded land brought back under restoration through the initiative.

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Great Lakes / north-eastern US

The Great Lakes, Superior, Michigan, Huron, Erie, and Ontario, form the world's largest freshwater system, straddling the United States-Canada border, and anchor the industrial north-eastern United States. Linked by the St. Lawrence Seaway, they support steel, automobile, and shipping economies. For UPSC, the region illustrates industrial location factors: raw materials, cheap water transport, and large markets.

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Great Living Chola Temples

The Great Living Chola Temples are a UNESCO World Heritage group of three 11th and 12th century Dravida temples: the Brihadisvara at Thanjavur, the Brihadisvara at Gangaikondacholapuram, and the Airavatesvara at Darasuram. Built by Rajaraja I and his successors, they showcase the mature Chola vimana, stone sculpture, and bronze art. For UPSC, they are the definitive examples of Chola architecture and royal patronage.

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Great Nicobar Island Development Project

This is a NITI Aayog-conceived mega-infrastructure project on Great Nicobar Island in the Andaman and Nicobar Islands, implemented by the Andaman and Nicobar Islands Integrated Development Corporation at an estimated cost of about Rs 75,000 to 81,000 crore. Its components include the Galathea Bay International Container Transhipment Terminal, a greenfield international airport, a township and a gas and solar power plant, spread over about 166 sq km. Strategically located near the Strait of Malacca, it aims to cut India's dependence on foreign transhipment ports, but it is contested over large-scale forest diversion and the rights of the Shompen and Great Nicobarese tribal communities.

Example: The proposed Galathea Bay transhipment terminal is intended to handle cargo that India currently routes through foreign ports such as Colombo and Singapore.

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Great Renunciation

The Great Renunciation is the Buddha's abandonment of palace life at Kapilavastu at about the age of twenty-nine to seek liberation from suffering. Moved by the Four Sights (an old man, a sick man, a corpse and a serene ascetic), Siddhartha Gautama left his wife Yasodhara and infant son Rahula by night, marking the start of his spiritual quest. For UPSC, it is the pivotal event of GS-1 ancient Indian history, explaining the origins of Buddhist renunciation.

Example: The Mahabhinishkramana reliefs at Sanchi and Bharhut, which depict the Buddha's departure symbolically through an empty horse and parasol.

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Greater India

Greater India is the historical concept of the cultural sphere shaped by Indian civilisation beyond the subcontinent's borders, covering much of South-East Asia and parts of Central Asia. From the early centuries CE, Indian religions, scripts, art and statecraft travelled with traders and monks, producing Sanskritised kingdoms without direct political control. For UPSC, it underpins GS-1 ancient history and GS-2 cultural diplomacy, explaining India's soft power in the region.

Example: Angkor Wat in Cambodia, a twelfth-century temple mountain dedicated to Vishnu.

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Greater Nagalim

Greater Nagalim is the Naga nationalist demand for uniting all Naga-inhabited areas, in Nagaland and in parts of Manipur, Assam and Arunachal Pradesh, into a single political entity. Championed by the NSCN(IM), it is the maximalist position in the decades-old Naga peace process and is resisted by neighbouring states fearing territorial loss. For UPSC, it is essential to GS-2 federalism and GS-3 internal security, framing the Naga Framework Agreement debate.

Example: The Naga Framework Agreement signed between the Government of India and the NSCN(IM) in August 2015.

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greater than 1

'Greater than 1' is a threshold marker in quantitative answers, meaning a value above unity. In UPSC data questions it typically signals elasticity, since demand is elastic when price elasticity exceeds 1, or a favourable ratio such as a multiplier above one. It is used across GS-3 and CSAT to interpret indices, ratios and elasticities.

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Greek and Aramaic

Greek and Aramaic are the two non-Indian languages in which some of Ashoka's edicts were issued in the empire's northwest, reflecting the region's Hellenistic and Achaemenid cultural inheritance. The Kandahar bilingual rock edict renders Ashoka's message in both languages. They matter for UPSC because they are primary evidence of the Mauryan empire's reach into the Hellenistic world and a favourite Prelims fact on Ashokan edicts and their languages.

Example: The Kandahar (Shar-i-Kuna) bilingual rock edict of Ashoka, inscribed in Greek and Aramaic in present-day Afghanistan.

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Greek on one side and Kharosthi on the other

Greek on one side and Kharosthi on the other describes the bilingual coinage of the Indo-Greek kings who ruled parts of north-west India from about 200 BCE. Their coins carry the king's name and titles in Greek on the obverse and a Prakrit legend in Kharosthi script on the reverse, a practical device for governing Greek and Indian subjects together. For UPSC, it is the classic GS-1 evidence of Indo-Greek cultural fusion and Hellenistic influence on Indian coinage.

Example: The silver tetradrachms of Demetrius I, which show him wearing an elephant-scalp headdress.

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Green and digital

Green and digital is shorthand for the twin transitions of decarbonising the economy while digitising it, the idea that climate action and digital technology should advance together. Digital tools such as smart grids, precision monitoring and paperless services can cut emissions, while green growth itself needs digital infrastructure. For UPSC, the phrase appears in GS-2 and GS-3 answers on international economic policy, especially the European Union's twin-transition agenda.

Example: The European Union's pairing of the European Green Deal with its Digital Decade programme.

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Green biotechnology

Green biotechnology is the colour-coded branch of biotechnology applied to agriculture and food production (green denotes agriculture in this scheme). It covers genetically modified and improved crop varieties, disease and pest-resistant plants, biofertilizers and biopesticides. Its promise is higher yields with lower chemical inputs, while its debates centre on biosafety, seed sovereignty and ecological effects of transgenic crops.

Example: Bt cotton, engineered to resist bollworm pests, is the most widely adopted genetically modified crop in India.

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Green Box

The Green Box is the WTO category for subsidies considered non- or minimally trade-distorting, such as research, extension, infrastructure and decoupled income support. Green Box payments face no spending limits. For UPSC it is the safe harbour India invokes for schemes like PM-KISAN and agri-R&D.

Example: India notifies PM-KISAN as Green Box decoupled income support to keep it outside reduction commitments.

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Green crackers

Green crackers are fireworks reformulated by CSIR-NEERI to emit significantly less particulate matter and harmful gases than conventional crackers, through changed chemistry such as dust-suppressing additives and reduced aluminium and barium content.

Example: The Supreme Court has restricted NCR Diwali bursting to green crackers to curb the seasonal PM2.5 spike.

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Green Credit Programme

The Green Credit Programme is a market-based mechanism of the Ministry of Environment, Forest and Climate Change to incentivise voluntary environment-positive actions. Notified through the Green Credit Rules, 2023 under the Environment (Protection) Act, 1986, it awards tradable green credits for actions such as tree plantation, water conservation, waste management and air-pollution reduction, beginning with plantation and eco-restoration of degraded forest land. The Indian Council of Forestry Research and Education, Dehradun, is the programme's administrator, and the scheme is aligned with the LiFE (Lifestyle for Environment) movement.

Example: Entities that plant trees on identified degraded forest land parcels can earn green credits registered on the programme's registry and traded on a domestic platform.

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Green Energy Corridor

The Green Energy Corridor is India's transmission-infrastructure programme to evacuate renewable electricity from resource-rich regions to consumption centres, enabling the 500 GW non-fossil target for 2030. Phase I built about 9,700 circuit km of transmission lines and substations, while Phase II, approved in 2021 at about Rs 13,042 crore, adds intra-state transmission systems in seven states to evacuate roughly 20 GW of renewable power. A dedicated green corridor is also planned to evacuate 13 GW from Ladakh's solar and wind potential.

Example: Phase II builds intra-state transmission networks in states such as Tamil Nadu, Gujarat and Rajasthan so that solar and wind power generated there can reach the national grid.

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Green Energy Corridors are

Green Energy Corridors are dedicated transmission networks built in India to carry renewable power from generation-rich regions to consumption centres. Developed under a central scheme with inter-state and intra-state components, they add high-voltage lines, substations and grid-strengthening works so that solar and wind output does not get stranded. For UPSC, they matter for GS-3 energy security and climate commitments, linking renewable targets to actual grid capacity.

Example: The inter-state Green Energy Corridor projects executed across renewable-rich states such as Rajasthan, Gujarat and Tamil Nadu.

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Green GDP

Green GDP is an adjusted national-accounts measure that subtracts the costs of environmental degradation and natural resource depletion from conventional GDP. It tries to capture whether growth is sustainable by accounting for pollution damage, deforestation and mineral exhaustion. It matters for UPSC because it sits at the centre of the growth-versus-environment debate in Mains answers on sustainable development, and China famously experimented with green accounting in 2004 before shelving it.

Example: China's 2004 green GDP experiment, which found pollution costs equivalent to about 3 per cent of GDP before the project was discontinued.

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green hydrogen

Green hydrogen is hydrogen produced by splitting water through electrolysis powered by renewable electricity from sources such as solar or wind, so the production process releases no carbon dioxide. It is the cleanest form of hydrogen, unlike grey hydrogen made from fossil fuels, which emits CO2. Because it can store renewable energy and replace fossil fuels in heavy industry, it is central to plans for deep decarbonisation.

Example: India's National Green Hydrogen Mission, approved in January 2023 with an outlay of Rs 19,744 crore, targets at least 5 million metric tonnes of annual green hydrogen production capacity by 2030.

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Green hydrogen hubs

Green hydrogen hubs are clusters where production, storage, consumption and export infrastructure for green hydrogen are co-located to achieve economies of scale. Under the National Green Hydrogen Mission, such hubs are being developed at major ports so that green hydrogen and its derivatives (ammonia, methanol) can be produced near renewable-energy sources and shipped directly to overseas markets. Identified locations include V.O. Chidambaranar Port (Tuticorin), Deendayal Port (Kandla) and Paradip Port.

Example: The hub planned at Deendayal Port, Kandla, is meant to anchor India's export of green hydrogen and green ammonia.

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Green India Mission

The Green India Mission is one of the eight missions under the National Action Plan on Climate Change, launched to expand and improve India's forest and tree cover. It combines afforestation and reforestation with livelihood support for forest-dependent communities, aiming at ecosystem restoration and carbon sequestration together. For UPSC, it is a standard GS-3 environment answer point on India's climate policy, linking forests, adaptation and community participation.

Example: Its launch in 2014 as part of the NAPCC, alongside the Solar Mission and the Water Mission.

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Green India Mission (GIM)

The Green India Mission is one of the eight National Missions under India's National Action Plan on Climate Change. It aims to increase forest and tree cover on 5 million hectares and improve the quality of cover on another 10 million hectares. The mission treats forests as providers of ecosystem services, linking afforestation with biodiversity conservation, carbon sequestration and livelihoods of forest-dependent communities through convergence with schemes such as MGNREGA.

Example: GIM-funded restoration of degraded lands is implemented through Joint Forest Management Committees that involve local communities in planting and protection.

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Green port

A green port is a port that reduces emissions, waste and water pollution from its own operations through measures such as shore power, clean equipment and proper waste reception. It keeps the landward gateway of the blue economy from undermining gains at sea.

Example: Port modernisation under Sagarmala paired with Maritime India Vision targets.

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Green Revolution

The Green Revolution is the 1960s-70s transformation of Indian agriculture through high-yielding dwarf wheat and rice varieties, chemical fertilisers, pesticides and irrigation. Led by M.S. Swaminathan with Norman Borlaug's seeds, it ended ship-to-mouth food dependence but concentrated gains in irrigated northwestern belts. For UPSC it is the foundational event of modern Indian agriculture, debated for its ecological and equity costs.

Example: Punjab's wheat yields tripling within a decade on dwarf varieties and tube-well irrigation is the Green Revolution's signature.

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Green Wall

The Green Wall refers to India's Aravalli Green Wall Project, an initiative to build a roughly 1,400 km long and 5 km wide belt of native vegetation around the Aravalli hills across Haryana, Rajasthan, Gujarat and Delhi. It aims to check desertification and halt the eastward spread of the Thar desert through afforestation with native species, rejuvenation of water bodies and community participation. The project is modelled on Africa's Great Green Wall in the Sahel.

Example: Africa's Great Green Wall, launched by the African Union in 2007 with the goal of restoring 100 million hectares of degraded Sahelian land by 2030.

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green, social and sustainability bonds

Green, social and sustainability bonds are ESG debt securities whose proceeds are earmarked for environmental or social projects. Green bonds fund climate and environmental projects, social bonds fund projects like affordable housing and healthcare, and sustainability bonds fund a mix of both. SEBI issued an operational framework for such ESG debt securities in June 2025. They matter for GS-3 on sustainable finance and climate finance.

Example: SEBI's June 2025 circular creating the operational framework for social, sustainability and sustainability-linked bonds

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greenhouse effect

The greenhouse effect is the natural warming of the Earth's surface caused by atmospheric gases, such as carbon dioxide, methane, and water vapour, which trap outgoing infrared radiation. Without it, the planet would be far too cold for life; because of it, the Earth stays warm enough to support living things. Human activity has intensified this effect by adding extra greenhouse gases, pushing global temperatures upward.

Example: Burning of fossil fuels since the Industrial Revolution has raised atmospheric CO2 from about 280 parts per million to over 420 parts per million, amplifying the natural greenhouse effect.

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Greenhouse gases (GHGs)

Greenhouse gases are gases that absorb and re-emit infrared radiation, trapping heat in the atmosphere and keeping the planet warm enough for life. The principal ones are carbon dioxide, methane, nitrous oxide, ozone, water vapour and fluorinated gases such as CFCs and HFCs. Human activity has sharply raised their concentrations, especially CO2 from fossil-fuel burning and methane from agriculture and waste, intensifying the greenhouse effect and driving global warming. Because CO2 persists in the atmosphere for centuries, past emissions commit the planet to long-term warming.

Example: Atmospheric CO2 has crossed 420 parts per million, compared with about 280 ppm before industrialisation.

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Greenland / West Antarctic ice

The Greenland Ice Sheet and the West Antarctic Ice Sheet are two of the largest potential tipping elements in the climate system. The West Antarctic sheet rests on bedrock below sea level, making it vulnerable to runaway collapse once warm ocean water undercuts it, while Greenland is losing ice at an accelerating rate from surface melting. Full loss of either would raise global sea levels by several metres over centuries to millennia, redrawing coastlines worldwide.

Example: West Antarctica's Thwaites Glacier, nicknamed the Doomsday Glacier for its instability, is closely monitored as a bellwether for ice-sheet collapse.

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Greenpeace India

Greenpeace India is the Indian arm of the global Greenpeace environmental network, active in India since 2001 as a registered society. It campaigns on climate change, air pollution, forest protection, sustainable agriculture and nuclear safety, and is known for non-violent direct-action protests and research-based advocacy. It has also been at the centre of regulatory controversies, including the suspension of its FCRA registration by the Home Ministry in 2015 over alleged violations.

Example: Its air-pollution monitoring and campaigns added public pressure that preceded the launch of the National Clean Air Programme in 2019.

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greenwashing

Greenwashing is the practice of making false, exaggerated or misleading claims about the environmental benefits of a product, service or company in order to attract eco-conscious consumers. It hides real environmental harm behind marketing language and imagery. In India, the ASCI guidelines for advertisements making environmental or green claims, effective 15 February 2024, require such claims to be reliable, verifiable and transparent. It is a GS-3 and ethics topic on consumer protection.

Example: the ASCI Guidelines for Advertisements Making Environmental/Green Claims, effective 15 February 2024

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Gresham's Law states

Gresham's Law states that bad money drives out good: when two forms of money circulate at a legally fixed exchange rate, people spend the debased or overvalued currency and hoard the intrinsically more valuable one. Named after the Tudor financier Thomas Gresham, it explains why full-weight coins vanish from circulation under debased or bimetallic systems. For UPSC, it is a crisp GS-3 economics definition, useful in questions on currency, coinage and monetary history.

Example: The disappearance of full-weight silver coins from circulation in economies that issued lighter, debased coinage at the same face value.

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Grey biotechnology

Grey biotechnology is the colour-coded branch of biotechnology devoted to environmental protection and remediation (grey denotes the environment). It uses microbes, enzymes and plants to clean up polluted soil and water (bioremediation), treat industrial effluents and convert waste into useful products. It is central to low-cost, nature-based solutions for industrial pollution.

Example: Oil-degrading bacteria are used to bioremediate sites contaminated by crude-oil spills.

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Grey hydrogen

Grey hydrogen is hydrogen produced from natural gas through steam methane reforming without any carbon capture, so the process releases large quantities of carbon dioxide, several tonnes of CO2 per tonne of hydrogen. It is currently the dominant and cheapest production route worldwide, but it offers no climate benefit. In the colour scheme, grey (unabated fossil) contrasts with blue hydrogen (fossil with carbon capture) and green hydrogen (renewable electrolysis).

Example: Most of the hydrogen India uses today in refineries and fertiliser plants is grey hydrogen made from natural gas.

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Grey Revolution

The Grey Revolution is the colour-revolution label for fertilisers, named for the grey of urea and chemical fertilisers. It denotes the growth of the fertiliser industry that underpinned Green Revolution yields, and now the debate over its overuse. For UPSC it connects input industry growth to soil-health concerns.

Example: India's rise as a top fertiliser consumer, and the subsequent soil-degradation debate, is the Grey Revolution's arc.

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grey zone

The grey zone is the space between peace and war, in which states pursue strategic objectives through coercive actions that stay below the threshold of open armed conflict. Tactics include cyberattacks, disinformation, economic coercion and deniable proxy or paramilitary actions. It is a GS-2 and GS-3 security topic on hybrid warfare and strategic competition, discussed at the Raisina Dialogue in 2024.

Example: the 2014 Russian annexation of Crimea using unmarked 'little green men'

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grey-zone tactics

Grey-zone tactics are coercive actions that sit between peace and open war, such as cyber intrusions, disinformation, salami-slicing border moves, drone smuggling and economic coercion. They are designed to stay below the threshold that would trigger a full military response. For India, Chinese salami-slicing on the LAC and Pakistan's drone-based smuggling are textbook examples.

Example: Drone-based arms smuggling across the Punjab border

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grey-zone warfare

Grey-zone warfare is coercive statecraft between peace and open war, using cyber intrusions, disinformation, salami-slicing, drone smuggling and economic coercion that stay below the threshold of military response. It matters because adversaries exploit the gap between peace and war to win without fighting.

Example: Drone smuggling and disinformation as tools below the war threshold

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Grid and storage

Grid and storage refers to the twin infrastructure needed to absorb large shares of variable solar and wind power: a modernised transmission grid (smart grids, inter-state corridors, flexible dispatch) and energy storage to shift electricity from surplus hours to deficit hours. Storage options include pumped-hydro plants, battery energy storage systems and, over longer durations, green hydrogen. For India's 500 GW non-fossil target, grid and storage are as critical as generation capacity itself.

Example: Pumped-storage hydro plants, such as the Tehri pumped-storage project in Uttarakhand, act as giant water batteries that stabilise the grid.

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grid and storage bottlenecks

Grid and storage bottlenecks are the practical constraints that limit how much renewable electricity an energy system can absorb: transmission networks that cannot carry new solar and wind power to demand centres, and too little storage to manage the intermittency of that power. Even when generation is cheap, these bottlenecks cause curtailment, evacuation delays, and grid instability. Removing them needs investment in transmission corridors, battery storage, and flexible grid management.

Example: A wind farm whose output is curtailed because the local transmission line is saturated is a typical grid bottleneck in action.

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Grievance redressal

Grievance redressal is the system by which citizens' complaints against government departments are received, tracked and resolved within fixed timelines. In India it runs through portals such as CPGRAMS, citizen charters, public grievance officers in every ministry, and mechanisms like the Lokpal and Lokayuktas for higher-level accountability. For UPSC, it is a core GS-2 governance topic, testing administrative responsiveness, transparency and the citizen-centric state.

Example: The CPGRAMS portal, where citizens lodge complaints against central ministries and receive a tracked, time-bound response.

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Grihya Sutras

The Grihya Sutras are Sanskrit manuals of domestic ritual composed in the late Vedic period, forming part of the Kalpa Sutras attached to each Veda. They prescribe the samskaras or life-cycle rites (birth, upanayana, marriage, funerals), daily household worship and the duties of the householder, giving a detailed picture of ordinary Aryan social life. For UPSC, they are a key GS-1 source for ancient Indian society, complementing the Dharma Sutras on law.

Example: Their detailed prescriptions for the upanayana (sacred-thread) and vivaha (marriage) ceremonies.

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Gross capital formation

Gross capital formation is the total addition to a country's capital stock in a period, covering new machinery, buildings, infrastructure and inventories, before deducting depreciation. Its fixed-capital component is the direct measure of investment, and a rising investment rate generally signals faster future growth. For UPSC, it is core GS-3 vocabulary: India's investment rate hovers around 30 per cent of GDP, and reviving it is a recurring policy debate.

Example: The National Statistical Office's annual release of gross fixed capital formation as a share of GDP.

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Gross Domestic Product (GDP)

Gross Domestic Product is the total market value of all final goods and services produced within a country's borders in a given period, usually a year or quarter. It is the headline measure of economic size, calculated in India by the National Statistical Office through production, income and expenditure approaches. For UPSC, GDP is the starting point of GS-3 economics: growth rates, per-capita income, sectoral shares and cross-country comparisons all build on it.

Example: India ranks among the world's five largest economies by nominal GDP.

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Gross Domestic Saving (GDS)

Gross Domestic Saving is the total saving of an economy's households, private corporations and public sector, measured as income not consumed. High domestic saving finances investment without foreign borrowing, so the saving rate closely tracks the investment rate and growth potential. For UPSC, it is a GS-3 macroeconomics staple: India saves roughly 30 per cent of GDP, with households contributing the largest share, mostly in physical assets like housing and gold.

Example: The Economic Survey's reporting of India's gross domestic saving at about 30 per cent of GDP.

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Gross Enrolment Ratio

The Gross Enrolment Ratio is the ratio of total enrolment at a given education level to the population of the official age group for that level, expressed as a percentage. Because it counts every enrolled student regardless of age, it can exceed 100 per cent. For UPSC, it is the headline access metric reported in UDISE+ and the All India Survey on Higher Education.

Example: A GER above 100 per cent at primary level typically reflects over-age enrolment rather than genuine universal coverage.

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Gross Environment Product

Gross Environment Product is a metric that values the goods and services ecosystems provide to human well-being, such as carbon absorption, water regulation, soil conservation and biodiversity support. Like GDP, it aggregates economic value, but it measures the health of natural capital rather than market output, usually in both biophysical and monetary terms. It is presented as a complement to GDP so that development decisions account for ecological wealth.

Example: In China's Qinghai province, the estimated Gross Environment Product was found to exceed the province's GDP, showing how large nature's unpriced contribution can be.

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Gross Environment Product (GEP)

GEP is the annual value of final ecosystem goods and services supplied by a region's environment, quantified in biophysical and monetary terms, and treated as a parallel to GDP. Uttarakhand became the first Indian state to formally adopt GEP in 2021, notifying it in December 2021 with the idea championed by environmentalist Dr Anil P Joshi, and launched a GEP Index in 2024. It rests on four pillars: air, water, soil and forest, and is meant to feed directly into the state's development planning.

Example: Uttarakhand's GEP for 2021-22 was estimated at 0.9 percent against a benchmark norm of 3 to 5 percent, signalling room for ecological restoration.

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Gross National Happiness

Gross National Happiness is Bhutan's alternative development philosophy, holding that national progress should maximise collective well-being rather than material output alone. Formulated under King Jigme Singye Wangchuck, it rests on four pillars: good governance, sustainable socio-economic development, cultural preservation and environmental conservation. For UPSC, it is the classic GS-4 ethics and GS-2 governance counterpoint to GDP, illustrating a values-based measure of development.

Example: Bhutan's constitutional mandate that at least 60 per cent of the country remain under forest cover.

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Gross National Product (GNP)

Gross National Product is the total value of final goods and services produced by a country's residents in a period, wherever in the world they work, equal to GDP plus net factor income from abroad. It therefore exceeds GDP for countries receiving large remittances and falls short of it for countries hosting much foreign capital. For UPSC, the GDP-versus-GNP distinction is a favourite GS-3 conceptual question on national income accounting.

Example: The Philippines, whose large overseas workforce makes its GNP notably higher than its GDP.

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Ground

In UPSC and policy discourse, the ground means the field-level reality where policies actually meet people, as opposed to plans on paper. Phrases like ground staff, ground report and ground-truthing all point to implementation, verification and lived experience at the village, district or border-post level. For the exam, invoking the ground signals awareness that good policy design fails without delivery, monitoring and feedback from below.

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Ground plan

A ground plan is the scaled overhead drawing of a building or complex showing the arrangement of walls, rooms, courts and entrances at ground level. Archaeologists and art historians use ground plans to read stupas, temples, palaces and forts, revealing ritual circulation, construction phases and regional styles. For UPSC, describing a monument's ground plan is a standard GS-1 art-and-culture answer technique for questions on temple architecture or Buddhist sites.

Example: The published ground plans of the Sanchi stupa complex, showing the stupa, gateways, railing and surrounding monasteries.

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Ground-level ozone

Ground-level (tropospheric) ozone is a secondary air pollutant formed when nitrogen oxides and volatile organic compounds react in the presence of sunlight, rather than being emitted directly. It is a key ingredient of photochemical smog that irritates the respiratory system, aggravates asthma and damages crops. Unlike the protective ozone layer in the stratosphere, ground-level ozone is harmful to health and vegetation.

Example: Ozone levels typically peak on hot, sunny summer afternoons in cities such as Delhi during photochemical smog episodes.

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grounds of arrest

Grounds of arrest are the reasons for a person's custody, which Article 22(1) requires police to communicate to the arrested person along with the right to consult a legal practitioner. The Supreme Court's guidelines in D. K. Basu v. State of West Bengal (1997) made this enforceable through mandatory arrest memos and intimation to relatives. The requirement turns arrest from executive fiat into a procedurally guarded deprivation of liberty.

Example: D. K. Basu v. State of West Bengal (1997), which mandated written arrest memos recording time, place and grounds of arrest.

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groundwater contamination

Groundwater contamination is the pollution of underground aquifers by chemicals, sewage, industrial effluents, pesticides, or naturally occurring toxins that seep down from the surface. Because aquifers recharge very slowly, contaminated groundwater is extremely difficult and expensive to clean up, and it can poison drinking water for years. It is a serious concern in India, where groundwater provides most irrigation and drinking water.

Example: Arsenic contamination of groundwater in West Bengal and fluoride contamination in parts of Rajasthan are well-documented Indian cases.

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groundwater over-extraction

Groundwater over-extraction happens when water is pumped out of aquifers faster than rainfall and recharge can replace it, so water tables keep falling year after year. It forces wells to be deepened, raises pumping costs for farmers, and can permanently deplete aquifers in some rock formations. In India, subsidised electricity for agriculture has encouraged excessive pumping in several states.

Example: The Central Ground Water Board classifies a large share of blocks in Punjab as over-exploited, meaning annual extraction there exceeds annual recharge.

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Group Captain Shubhanshu Shukla

Group Captain Shubhanshu Shukla is an Indian Air Force officer and one of the four astronaut-designates of ISRO's Gaganyaan human spaceflight programme. He served as mission pilot on Axiom Mission 4, launched on 25 June 2025 aboard a SpaceX Falcon 9 and Crew Dragon, becoming the first Indian to visit the International Space Station. His flight marked India's return to human spaceflight after Rakesh Sharma's 1984 mission, and he returned to Earth on 15 July 2025.

Example: During his stay on the ISS he conducted microgravity experiments designed by ISRO, covering life sciences and materials research.

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Grouping

Grouping, in international relations and economics, means clustering countries into blocs, forums or categories for negotiation and analysis, such as developed versus developing countries or regional trade blocs. Groupings like the G20, ASEAN and BRICS let states pool bargaining power and set shared agendas, but they also create insider-outsider dynamics. For UPSC, GS-2 answers routinely begin by locating an issue within the relevant grouping to show structured thinking.

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growth

Growth is an increase in the value of goods and services an economy produces, measured by GDP or GNP growth rates. It is necessary but not sufficient for development: growth can be jobless, unequal, or environmentally destructive. The growth-versus-development and jobless-growth debates make it a perennial GS-3 theme, from national income accounting to inclusive growth.

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Growth Pole Theory

Growth Pole Theory, formulated by the French economist Francois Perroux in the 1950s, argues that economic growth concentrates around propulsive industries and then spreads to surrounding areas through linkages. Planners used it to justify building industrial complexes in backward regions, expecting them to act as growth centres pulling up their hinterlands. For UPSC, it is a standard GS-1 and GS-3 geography answer point on regional planning and balanced development.

Example: India's designation of growth centres under the regional planning approach of the Five-Year Plans.

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growth versus sustainability

Growth versus sustainability is the master tension of the environment bank: whether rising GDP can be decoupled from ecological destruction, or whether growth must be redefined rather than merely greened. The essay's spine is the argument that greening is not enough. It is the article's framing device for every environment-economy debate.

Example: The master tension: whether growth can be greened or must be redefined.

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GSAT

GSAT is the name of India's series of geostationary communication satellites, built and launched by ISRO, which provide telecommunications, direct-to-home broadcasting, broadband, weather and navigation services from geostationary orbit. The INSAT and GSAT series together form the backbone of India's space-based communication infrastructure.

Example: GSAT-7, also called Rukmini, provides communication services for the Indian Navy.

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GSLV

GSLV stands for Geosynchronous Satellite Launch Vehicle, ISRO's three-stage launch vehicle designed to place heavier satellites into geostationary transfer orbit. Its stages use solid, liquid and cryogenic propulsion, with the indigenous cryogenic upper stage being its defining technological feature.

Example: GSLV-F16 launched the NASA-ISRO NISAR Earth-observation mission on 30 July 2025.

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GSLV-F16

GSLV-F16 is a specific flight of ISRO's Geosynchronous Satellite Launch Vehicle that launched the NASA-ISRO Synthetic Aperture Radar (NISAR) mission on 30 July 2025 from Sriharikota. NISAR is the first major joint Earth-observation mission of NASA and ISRO, carrying a dual-frequency synthetic aperture radar with NASA's L-band and ISRO's S-band instruments.

Example: GSLV-F16 placed NISAR, the first major NASA-ISRO joint mission, into orbit for all-weather mapping of Earth's land and ice surfaces.

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GSOMIA

GSOMIA (General Security of Military Information Agreement) is the 2002 India-US foundational defence pact that sets standards for protecting classified military information shared between the two countries. It was the first of the four foundational agreements, followed by LEMOA in 2016, COMCASA in 2018 and BECA in 2020. For UPSC, GSOMIA anchors India-US defence cooperation and strategic-partnership questions.

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GSP

The Generalized System of Preferences (GSP) is a scheme by which developed countries grant duty-free or reduced-tariff access to exports from developing countries to promote their economic growth. The United States terminated India's GSP beneficiary status in June 2019, citing inadequate market access for American goods. For UPSC, GSP is a standard trade-policy concept linked to India-US trade ties and the WTO's special and differential treatment for developing countries.

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GST

GST is India's destination-based indirect tax on the supply of goods and services, launched on 1 July 2017 through the 101st Constitutional Amendment. It subsumed central and state levies such as excise, service tax, VAT and octroi into one tax with input tax credit across the value chain. The GST Council sets rates and rules, and states were compensated for revenue loss for five years. For UPSC, GST matters for fiscal federalism, Articles 246A, 269A and 279A, and cooperative federalism.

Example: The midnight launch from Parliament's Central Hall on 1 July 2017, branded 'One Nation, One Tax'.

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GST Appellate Tribunal

The GST Appellate Tribunal is the second-level appeal forum under the Goods and Services Tax regime, hearing appeals against orders of the first appellate authorities. It has a principal bench in New Delhi and state benches, and its orders can be further appealed before High Courts. For UPSC, its long-delayed operationalisation is the classic example of tax reform outpacing dispute-resolution infrastructure.

Example: After a seven-year wait, the tribunal's principal bench became functional in 2024, clearing the path for thousands of stuck GST disputes.

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GST Compensation Act, 2017

The GST (Compensation to States) Act, 2017 guaranteed states 14 per cent annual growth in GST revenue over their 2015-16 base for five years. Shortfalls were paid from a Compensation Fund fed by a cess on sin and luxury goods like tobacco, coal and motor vehicles. The guarantee ran to June 2022 and was extended to March 2026 so the Centre could service back-to-back pandemic loans. It is the core UPSC case study of fiscal federalism.

Example: The Centre's back-to-back loans of 2020-21 to pay states when GST collections collapsed during the pandemic.

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GST Council

The GST Council is the constitutional body created by Article 279A under the 101st Amendment of 2016 to steer the Goods and Services Tax. It is chaired by the Union Finance Minister and includes state finance ministers, with decisions taken by a weighted majority in which the Centre holds one-third of the votes and the states two-thirds. It matters for UPSC because it is the flagship example of cooperative federalism, with its rate slabs, compensation mechanism and dispute record appearing regularly in both Prelims and Mains.

Example: The 56th GST Council meeting, which restructured slabs while retaining a 40 per cent rate for luxury and sin goods.

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GST Council (Article 279A)

The GST Council is the joint federal body created by the 101st Constitutional Amendment of 2016 under Article 279A to decide GST rates, exemptions, thresholds and rules. Chaired by the Union Finance Minister, it gives the Centre one-third of the weighted votes and the states two-thirds, with decisions requiring a three-fourths majority. It matters because it is the operating core of cooperative federalism in taxation and a staple UPSC prelims and mains topic on fiscal federalism.

Example: created by the 101st Amendment; first meeting September 2016

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GSTAT

GSTAT is the acronym for the Goods and Services Tax Appellate Tribunal, the dedicated second appeal body under the CGST Act for GST disputes. Taxpayers approach it after the first departmental appeal, and its decisions are appealable before High Courts. For UPSC, GSTAT illustrates the gap between a landmark tax reform and the adjudication machinery needed to sustain it.

Example: The appointment of the tribunal's first President in 2024 ended years in which GST litigants had no dedicated appellate forum.

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GSTN

The Goods and Services Tax Network (GSTN) is the IT backbone of India's GST system, which uses artificial intelligence to detect tax fraud and improve compliance. It is a flagship GovAI example of automation in public finance.

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gudhapurushas

Gudhapurushas are the secret agents or spies of Kautilya's Arthashastra, forming the core of the Mauryan intelligence system. They were divided into stationary agents (sanstha), such as monks, merchants and householders, and roving agents (sanchara), such as fortune-tellers, poisoners and mendicant women, and they watched enemies, allies and the king's own officials. They are a GS-1 and GS-4 staple on ancient Indian statecraft.

Example: the roving spy categories of tikshna, rasada and bhikshuki listed in the Arthashastra

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guerrilla

A guerrilla is a member of a small, irregular armed force that fights a larger conventional army using ambushes, raids, sabotage and hit-and-run tactics. Guerrillas avoid pitched battles and rely instead on mobility, difficult terrain and local support to wear down a stronger enemy over time. The term appears in GS-1 modern history on revolutionary movements and in GS-3 internal security.

Example: the Maratha light cavalry under Chhatrapati Shivaji Maharaj in the 17th century

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guerrilla warfare

Guerrilla warfare is irregular warfare in which small, mobile forces use ambush, sabotage, raids and hit-and-run tactics against a larger and less mobile enemy, instead of facing it in open battle. It depends on terrain, surprise, speed and popular support, making it the classic weapon of the weak against the strong. It is a GS-1 and GS-3 concept spanning revolutionary movements and insurgency.

Example: Shivaji Maharaj's 17th-century campaigns against the Bijapur Sultanate and the Mughals

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Guide behaviour

To guide behaviour, in GS-4 ethics, is the function of moral frameworks such as codes of conduct, codes of ethics and ethical theories that tell a civil servant what is right in ambiguous situations. Deontological rules, consequentialist reasoning and virtue ethics each guide behaviour differently, but all aim to make public action predictable and principled. For the exam, the phrase frames answers on why ethics must move from personal values to institutional guidance.

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guide RNA

Guide RNA is a short synthetic RNA molecule used in CRISPR-Cas9 gene editing to steer the Cas9 enzyme to an exact location in DNA. It carries a sequence that matches the target gene, so Cas9 binds only at that spot and cuts the DNA strand there. Scientists then use the cell's repair process to disable, correct, or replace the gene.

Example: Guide RNAs are designed to target the faulty beta-globin gene in CRISPR-based therapies being developed for sickle cell disease.

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guideline activism

Guideline activism is the Indian Supreme Court's practice of laying down binding guidelines where the legislature has left a legal vacuum. Instead of merely deciding the case before it, the Court issues detailed directions that function as law until Parliament legislates. It is a GS-2 topic on judicial activism, separation of powers and the Court's role under Articles 32 and 142.

Example: the Vishaka guidelines of 1997 against sexual harassment of women at the workplace

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Guidelines on Disaster Management Exercises (DMEx)

The Guidelines on Disaster Management Exercises (DMEx) are NDMA guidelines that standardise how disaster mock drills and simulation exercises are planned and conducted in India. Regular exercises test plans, coordination and community readiness.

Example: state-wide mega mock exercises on earthquakes are conducted under the DMEx guidelines

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Guiding model and focus

A guiding model and focus, in UPSC answer writing, means choosing one clear analytical lens for an answer and staying disciplined to the question's demand. The guiding model might be a constitutional value, a development framework or a theoretical perspective, while focus means resisting the temptation to write everything known about the topic. For the exam, examiners reward answers with a visible structure: model announced, focus maintained, conclusion aligned.

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guillotine

In the Indian Parliament, the guillotine is a form of closure by which the Speaker puts all outstanding Demands for Grants to vote without discussion once the allotted time expires. Unlike closure motions, it is not preceded by any motion. It ensures the budget process finishes before the new financial year begins, though it means most demands pass undiscussed. It is a GS-2 Polity staple on parliamentary procedure and the budget process.

Example: the annual application of the guillotine to the remaining Demands for Grants in the Lok Sabha

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Gujarat

Gujarat is a western Indian state with its capital at Gandhinagar, known for having the longest coastline of any Indian state and a historic trading culture. It is a major industrial and petrochemical hub, home to ports like Deendayal (Kandla) and Mundra, the Sabarmati riverfront, and the Statue of Unity. For UPSC, Gujarat features in GS-1 (Harappan sites like Lothal and Dholavira), GS-3 (industrial policy, ports) and polity questions on cooperative federalism.

Example: The International Financial Services Centre at GIFT City near Gandhinagar, India's first operational smart-city financial hub.

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Gujarat Cooperative Milk Marketing Federation (GCMMF)

The Gujarat Cooperative Milk Marketing Federation is the apex body marketing milk and products of Gujarat's district dairy unions under the Amul brand. Federating 18 district unions of 36 lakh farmers, it handles procurement, processing and national distribution. For UPSC it is the three-tier Anand pattern's apex institution.

Example: Its daily collection and processing of crores of litres shows cooperative scale at work.

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Gujarra

Gujarra appears as a variant form of Gurjara, the name of an early medieval clan and region in western India from which Gujarat takes its name. The Gurjaras rose to prominence through the Gurjara-Pratihara dynasty, which dominated northern India between the eighth and eleventh centuries and checked Arab advances. For UPSC, the term belongs to GS-1 ancient and early medieval history, anchoring questions on the tripartite struggle and Rajput origins.

Example: The Gurjara-Pratihara empire of Mihira Bhoja, centred on Kannauj, as the political expression of Gurjara power.

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Gujral Doctrine

The Gujral Doctrine is the set of five principles of Indian foreign policy articulated by I.K. Gujral as External Affairs Minister in 1996, holding that India should offer non-reciprocal, generous concessions to smaller South Asian neighbours without demanding matching returns. It underpinned treaties with Bangladesh and Nepal. It matters for UPSC because it is the classic Neighbourhood First formulation before the phrase existed, and questions test its principles against India's later neighbourhood policy.

Example: The 1996 Ganga water-sharing treaty with Bangladesh, concluded in the spirit of the Gujral Doctrine's non-reciprocal generosity.

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Gulabi Gang

The Gulabi Gang is a women's activist group founded in 2006 in Bundelkhand, Uttar Pradesh, by Sampat Pal Devi, recognisable by its members' pink saris and bamboo lathis. It confronts domestic violence, dowry harassment, corruption and official apathy through direct action and public shaming, filling gaps left by weak policing. For UPSC, it is a GS-1 and GS-2 society case study in grassroots women's empowerment and vigilante justice outside formal institutions.

Example: Its interventions in dowry and domestic-violence cases in Banda and nearby Bundelkhand districts.

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Gulamgiri

Gulamgiri, meaning Slavery, is an 1873 Marathi book by the social reformer Jyotirao Phule that denounces caste oppression as a system of bondage comparable to American slavery. Dedicated to the abolitionists of the United States, it argues that Brahminical priesthood deliberately kept lower castes uneducated to preserve its dominance. For UPSC, Gulamgiri is a landmark GS-1 text of the nineteenth-century social reform movement, alongside Phule's founding of the Satyashodhak Samaj.

Example: Phule's dedication of the book to the American abolitionists who fought to free enslaved Black people.

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Gulbadan Begum

Gulbadan Begum was a Mughal princess, daughter of Babur and sister of Humayun, who authored the Humayun-nama at Akbar's request. Written in Persian from personal memory, her account is a rare insider history of the early Mughal court, covering Humayun's reign, exile and restoration, including the role of royal women. For UPSC, she is a GS-1 medieval-history source illustrating women's voices in Mughal historiography and the Persianate chronicle tradition.

Example: The Humayun-nama itself, a rare Mughal-era history authored by a royal woman.

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Gulbarga

Gulbarga (Kalaburagi) is the Karnataka city that served as the first capital of the Bahmani Sultanate from 1347 to about 1429 under Alauddin Hasan Bahman Shah, before the court moved to Bidar. Its fort, the Jama Masjid with its distinctive dome-less vaulted roof, and the Haft Gumbad tombs mark Bahmani architecture. It matters for UPSC because the Bahmani kingdom is the Deccan counterpart to the Delhi Sultanate in medieval history, and Gulbarga anchors its founding phase.

Example: The Gulbarga fort's Jama Masjid, whose vast columned hall is roofed with small domes in a style unique to the Deccan.

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Gulbarga Fort

Gulbarga Fort is a fourteenth-century fortified complex at Kalaburagi in Karnataka, built as the first capital stronghold of the Bahmani Sultanate under Alauddin Hasan Bahman Shah. Its massive walls, moat and gateways enclose one of the earliest Bahmani congregational mosques, marking the beginning of Deccan Sultanate architecture. For UPSC, it is a GS-1 medieval history and art-and-culture site, illustrating the Bahmanis' break from Delhi and their Persianate court culture.

Example: The Jama Masjid inside the fort, among the earliest large mosques of the Deccan Sultanates.

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Guler-Kangra

Guler-Kangra denotes the Pahari miniature painting tradition centred on Guler and Kangra in present-day Himachal Pradesh, the Guler style being the refined precursor of the Kangra school. Flourishing under Rajput patronage from the mid-eighteenth century, it is celebrated for lyrical depictions of Krishna, the Bhagavata Purana and the heroines of Sanskrit poetry. For UPSC, it is a staple GS-1 art-and-culture topic, contrasting Pahari delicacy with Mughal and Rajasthani styles.

Example: The Bhagavata Purana series of Guler paintings illustrating the life of Krishna.

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Gulf Cooperation Council

The Gulf Cooperation Council is a political and economic union of six Arab states (Saudi Arabia, the United Arab Emirates, Qatar, Kuwait, Oman and Bahrain), founded in 1981 and headquartered in Riyadh. It coordinates energy policy, security and economic integration among monarchies that hold a large share of the world's oil reserves. For UPSC, the GCC is central to GS-2 West Asia policy: energy security, the Indian diaspora and remittances all run through it.

Example: The millions of Indian workers in GCC states, whose remittances form a major pillar of India's foreign-exchange inflows.

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Gulf of Kachchh

The Gulf of Kachchh is a shallow inlet of the Arabian Sea indenting Gujarat's coast between the Kachchh and Saurashtra peninsulas. Known for extensive tidal flats, salt pans and coral and mangrove ecosystems, it hosts ports, refineries and India's first marine national park on its southern shore. For UPSC, it features in GS-1 geography and GS-3 environment answers on coastal ecosystems, tidal energy potential and industrial pressure on marine habitats.

Example: The Marine National Park in the Gulf of Kachchh near Jamnagar, India's first marine national park.

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Gulf of Kachchh Marine National Park

The Gulf of Kachchh Marine National Park in Gujarat, established in 1982, was India's first marine national park. Spread over about 163 sq km around 42 islands and reefs between Okha and Navlakhi, it protects coral reefs, mangroves, mudflats and marine fauna including dolphins, dugongs, sea turtles and migratory birds. It is a core part of the larger Gulf of Kachchh Marine Sanctuary ecosystem.

Example: The park's coral reefs around Pirotan Island are among the few reef systems on India's west coast.

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Gulf of Mannar

The Gulf of Mannar is the shallow bay between southeastern Tamil Nadu and northwestern Sri Lanka, connected to Palk Bay by the Adam's Bridge (Rama Setu) chain of shoals. It hosts coral reefs, seagrass beds, pearl banks and dugongs, protected as India's first marine biosphere reserve (1989). It matters for UPSC because it links geography (Palk Strait, Sethusamudram project), biodiversity and the sensitive India-Sri Lanka maritime boundary, including the Katchatheevu issue.

Example: The Gulf of Mannar Biosphere Reserve, India's first marine biosphere reserve, covering over 10,500 square kilometres of reefs and islands.

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Gulf of Mannar (south of Rama Setu)

The Gulf of Mannar, lying south of Rama Setu (Adam's Bridge) between south-eastern India and Sri Lanka, is a shallow bay rich in coral reefs, seagrass beds and pearl banks. Home to dugongs, sea turtles and diverse marine life, it was declared India's first marine biosphere reserve. For UPSC, it is important for GS-1 geography, GS-3 environment (coral conservation, Sethusamudram project debates) and India-Sri Lanka maritime relations.

Example: The Gulf of Mannar Biosphere Reserve, established to protect its coral reefs, dugongs and pearl oyster beds.

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Gulf of Mannar Marine National Park

The Gulf of Mannar Marine National Park in Tamil Nadu, established in 1986, covers about 560 sq km across 21 islands and surrounding reefs and seagrass beds. It forms the core of the Gulf of Mannar Biosphere Reserve (designated 1989) and protects coral reefs, seagrass meadows, sea cucumbers and endangered species such as the dugong and sea turtles. It faces pressures from coral mining, destructive fishing and coastal development.

Example: The Gulf of Mannar and adjoining Palk Bay are among India's most important remaining dugong habitats.

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Gulf War

The Gulf War was the 1990-91 conflict triggered by Iraq's invasion of Kuwait in August 1990, answered by a United States-led multinational coalition. After sanctions and diplomacy failed, Operation Desert Storm in January 1991 swiftly liberated Kuwait, though Saddam Hussein remained in power. For UPSC, it matters in GS-2 (India's evacuation of over 170,000 citizens from the region) and GS-3 (the oil shock that deepened India's 1991 balance-of-payments crisis).

Example: India's 1990 airlift of stranded citizens from Amman, then counted among the largest civilian evacuations in history.

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Gulf War oil shock (1990-91)

The Gulf War oil shock of 1990-91 was the sharp spike in crude prices after Iraq invaded Kuwait, which removed a major oil supplier from world markets. For oil-importing India, the import bill ballooned just as remittances and exports faltered, draining foreign-exchange reserves to critically low levels. For UPSC, it is the immediate trigger of the 1991 balance-of-payments crisis in GS-3, forcing the gold pledge, IMF borrowing and the liberalisation reforms.

Example: India's emergency pledging of gold reserves with the Bank of England in 1991 to secure foreign exchange.

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Gulzar Houz, Hyderabad (2025)

The Gulzar Houz fire of May 2025 in Hyderabad's old city killed 17 people of one family when a building-store fire trapped residents above a shop. It highlighted mixed-use building risks.

Example: the tragedy intensified scrutiny of residential-cum-commercial buildings in Hyderabad

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Gunadhya

Gunadhya was the ancient author of the Brihatkatha, the Great Story, composed in Paisachi Prakrit and now lost in its original form. This vast collection of tales about the legendary king Udayana became the fountainhead of later Indian story literature, retold in Sanskrit by Somadeva and Kshemendra. For UPSC, Gunadhya is a GS-1 ancient-history name illustrating the Prakrit literary tradition and the oral-story roots of classical Sanskrit katha literature.

Example: Somadeva's eleventh-century Kathasaritsagara, a Sanskrit retelling drawn from Gunadhya's Brihatkatha.

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Gunnar Myrdal

Gunnar Myrdal was the Swedish economist whose 1968 book Asian Drama analysed South Asian poverty and called for radical land reforms. He argued that without breaking feudal land relations, development planning would fail the poor. For UPSC he is the classic external authority cited for land-reform urgency.

Example: His warning that Asian planning ignored land inequality is quoted in land-reform debates.

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gunpowder, field artillery and the Tulughama cavalry tactic

This trio describes Babur's decisive innovations at the First Battle of Panipat on 21 April 1526. Gunpowder-powered field guns and matchlocks were shielded behind carts (araba) tied with hide ropes, while the Tulughma tactic divided the army into left, right and centre divisions to outflank and encircle Ibrahim Lodi's much larger force. It is a classic GS-1 topic on military technology and the founding of the Mughal Empire.

Example: the First Battle of Panipat, 21 April 1526, in which Babur defeated Ibrahim Lodi

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Guns of August

The Guns of August is Barbara Tuchman's 1962 Pulitzer-winning history of the first month of World War I, showing how rigid plans and misjudgment dragged Europe into catastrophe. The essay deploys it for decision-making under pressure and the uses of history. It is the classic anecdote-bank source on how wars begin by accident and momentum.

Example: Tuchman's 1962 account of Europe's slide into World War I.

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Gupta (4th–6th c)

The Gupta period, from the fourth to the sixth century CE, is the era of the Gupta dynasty founded by Chandragupta I, reaching its height under Samudragupta and Chandragupta II. Often called the classical or golden age of ancient India, it saw advances in mathematics (Aryabhata), astronomy, sculpture, literature and temple architecture. For UPSC, it dominates GS-1 ancient history: administration, land grants, coinage and cultural efflorescence are all examined through it.

Example: The Allahabad pillar inscription of Samudragupta, composed by his court poet Harisena.

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Gupta coins

Gupta coins are the gold, silver, and copper coinage issued by the Gupta emperors, among the finest artistic coin types of ancient India. They depict rulers in varied poses, with reverses showing deities such as Lakshmi and Garuda, and include rare commemorative issues celebrating victories and sacrifices. For UPSC, they illustrate the prosperity and ideological claims of the Gupta state and serve as a primary source for reconstructing its political history.

Example: Samudragupta's Ashvamedha type coins commemorating his horse sacrifice.

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Gupta Empire

The Gupta Empire is a north Indian imperial dynasty that ruled from about 320 to 550 CE, founded by Chandragupta I and reaching its height under Samudragupta and Chandragupta II. Its era is remembered for advances in astronomy, mathematics, literature, temple art, and trade, often called classical India's golden age. For UPSC, it is the backbone of ancient history questions on administration, culture, and the decline of urban life.

Example: The Allahabad pillar inscription of Samudragupta records his military conquests across the subcontinent.

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Gupta Era

The Gupta Era is the calendar epoch beginning in 319-320 CE, conventionally dated from the accession of Chandragupta I, the founder of Gupta imperial power. Inscriptions and coins dated in Gupta years anchor the chronology of the classical age of Indian history. It matters for UPSC because dating events in Gupta years is a recurring Prelims device, and the era marks the political beginning of the period celebrated for achievements in art, literature, science and administration.

Example: The Allahabad pillar inscription of Samudragupta, composed by Harisena, whose Gupta-era dating fixes the emperor's reign in the fourth century CE.

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Guru Arjan Dev

Guru Arjan Dev is the fifth Sikh Guru, who led the Sikh community from 1581 to 1606. He compiled the Adi Granth, the first authorized Sikh scripture, in 1604, oversaw the completion of Harmandir Sahib at Amritsar, and was martyred at Lahore on the orders of Emperor Jahangir in 1606. For UPSC, his compilation of the Granth and martyrdom mark the consolidation of Sikh identity and the turn toward militarization.

Example: The installation of the Adi Granth at Harmandir Sahib, Amritsar, in 1604.

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Guru Granth Sahib

The Guru Granth Sahib is the Sikh holy scripture, compiled as the Adi Granth by Guru Arjan in 1604 and given its final form by Guru Gobind Singh, who in 1708 declared it the eternal Guru. Its 1,430 pages carry the hymns of the Sikh Gurus and Bhagat saints in Gurmukhi script. For UPSC, it is central to Sikhism, the Bhakti movement and medieval religious literature.

Example: Guru Arjan installed the Adi Granth at the Harmandir Sahib in Amritsar in 1604.

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Guru Nanak

Guru Nanak is the founder of Sikhism and the first of the ten Sikh Gurus, born in 1469 at Talwandi, now Nankana Sahib. His teachings rejected caste hierarchy and empty ritual, stressed one formless God, honest work, and community service, and were preserved in hymns later incorporated into the Adi Granth. For UPSC, he stands at the intersection of the bhakti movement and religious reform, a recurring theme in medieval history questions.

Example: His long travels, the Udasis, spread his message across South Asia and beyond.

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Guru-Shishya Parampara

The Guru-Shishya Parampara is the traditional Indian system of knowledge transmission in which a student lives with and learns directly from a teacher. Rooted in the ancient gurukul, it shaped education in philosophy, music, dance, martial arts, and craft through personal mentorship rather than formal schooling. For UPSC, it appears in art-and-culture questions on intangible heritage, music gharanas, and classical dance pedagogy.

Example: The gharana system of Hindustani classical music, where an ustad trains disciples over years of close apprenticeship.

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Gurukula

Gurukula is the household school in which a student lived in the Guru's home, learning through residence, service and close instruction. It matters as the baseline model of early Indian education: Taxila scaled the household up into a cluster of teachers, while Nalanda replaced it with an endowed residential monastery.

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Guruvayur Satyagraha (1931-32)

The Guruvayur Satyagraha of 1931-32 is a temple-entry movement in Kerala led by K. Kelappan demanding that untouchables be allowed into the Guruvayur temple. It ran for nearly a year, drew national attention including Gandhi's involvement, and was called off after a compromise referendum. For UPSC, it is a textbook case of the social-reform dimension of the freedom struggle and the anti-untouchability campaign in the princely states.

Example: K. Kelappan's fast-unto-death in September 1932 brought Gandhi's intervention and a compromise settlement.

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GVA at basic prices

GVA at basic prices (Gross Value Added) is the value of goods and services produced minus intermediate consumption, measured before product taxes (net of subsidies). GDP at market prices equals GVA at basic prices plus taxes on products minus subsidies on products. Since the 2011-12 base revision, India's official statistics headline growth in GVA terms. For UPSC, the GDP-GVA distinction is staple economy ground.

Example: The 2011-12 base revision made GVA at basic prices India's headline measure of economic growth.

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Gwadar

Gwadar is a deep-water port city on Pakistan's Balochistan coast, developed with Chinese assistance as the flagship maritime node of the China-Pakistan Economic Corridor. Its location near the Strait of Hormuz gives China an Arabian Sea outlet and an alternative to the Malacca route for energy imports. For UPSC, it anchors questions on the Belt and Road Initiative, the String of Pearls debate, and India's security concerns in the Indian Ocean.

Example: The port serves as the maritime terminus of the China-Pakistan Economic Corridor.

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Gwalior

Gwalior is a historic city in Madhya Pradesh that became the capital of the Scindia dynasty in the eighteenth century and a major princely state under Maratha and then British suzerainty. Its hill fort is among the oldest in India, and the city remains known for the Gwalior gharana of Hindustani music. For UPSC, it matters in modern history for the 1857 revolt and in culture for music and medieval fort architecture.

Example: Rani Lakshmibai died fighting the British at Gwalior in June 1858 during the 1857 revolt.

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Gwalior, Kirana, Patiala, Agra, Bhendibazaar

Gwalior, Kirana, Patiala, Agra, and Bhendibazaar are leading gharanas, or stylistic schools, of Hindustani classical music. Each preserves a distinct way of rendering ragas, with the Gwalior gharana known for systematic khayal, Kirana for slow sargam and swara purity, Patiala for tappa, Agra for dhrupad-influenced khayal, and Bhendibazaar for sargam patterns. For UPSC, gharana names recur in art-and-culture questions on music lineage.

Example: Bhimsen Joshi belonged to the Kirana gharana.

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