This list contains acronyms, initialisms, and pseudo-blends that begin with the letter G.
For the purposes of this list:
- acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
 - initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
 - pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
 
- (a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
 - (i) = initialism, e.g.: CD – (i) compact disc
 - (p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
 - (s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – megahertz)
 
Some terms are spoken as either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P.
- g – (s) Gram
 - G – (s) Gauss – (i) General Audiences (movie rating) - Gewehr (German, rifle)
 
G0–9
- G1 – (s) Assistant Chief-of-Staff, Personnel
 - G2 – (s) Assistant Chief-of-Staff, Intelligence
 - G3 – many, including Heckler & Koch G3; see entry – (s) Assistant Chief-of-Staff, Operations and Plans
 - G4
- (i) Generation Four PowerPC microprocessor
 - (s) Assistant Chief-of-Staff, Logistics
 
 - G5
- (i) Generation Five PowerPC microprocessor
 - Group of Five conferences (US college sports, especially football)
 - (s) Assistant Chief-of-Staff, Public Affairs
 
 - G6
- (s) Assistant Chief-of-Staff, Information Technology
 - (i) Group of 6 (France, Germany, United States, Japan, United Kingdom, Italy) (1975)
 
 - G7 – (s) Assistant Chief-of-Staff, Training – (i) Group of 7 (G6 + Canada) (1976)
 - G8 – (s) Assistant Chief-of-Staff, Finance – (i) Group of 8 (G7 + Russia) (1998)
 - G9 – (s) Assistant Chief-of-Staff, Civil-Military Co-operation (CIMIC)
 - G10 – (i) Group of 10 (G7 + Belgium, Netherlands, Sweden, Switzerland; numbering 11 in fact)
 - G15 – (i) Group of 15 (subset of G77, formed 1989: Algeria, Argentina, Brazil, Chile, Egypt, India, Indonesia, Jamaica, Kenya, Nigeria, Malaysia, Mexico, Peru, Senegal, Sri Lanka, Venezuela and Zimbabwe; currently numbers 17)
 - G20 – (i) Group of 20 (G8 + Argentina, Australia, Brazil, China, India, Indonesia, Mexico, Saudi Arabia, South Africa, South Korea, Turkey + current European Union presiding country) (1999)
 - G24 – (i) Group of 24 (subset of G77, formed 1971: Algeria, Argentina, Brazil, Colombia, Côte d'Ivoire, Democratic Republic of the Congo, Egypt, Ethiopia, Gabon, Ghana, Guatemala, India, Iran, Lebanon, Mexico, Nigeria, Pakistan, Peru, Philippines, South Africa, Syria, Sri Lanka, Trinidad and Tobago and Venezuela)
 - G77 – (i) Group of 77 (issued from the United Nations Conference on Commerce and Development, 1964; currently numbers 133)
 
GA
- Ga – (s) Gallium – Gigaannum
 - GA – (s) Gabon (ISO 3166 digram) – The Gambia (FIPS 10-4 country code) – (i) Gamblers Anonymous – Georgia (postal symbol) – Gigaampere – Goa (Indian state code) - (i) General Aviation
 - GAAR – (a) General Anti-Avoidance Rule (tax evasion)
 - GAB – (s) Gabon (ISO 3166 trigram)
 - GABA – (i) Gamma-AminoButyric Acid
 - GAD – (a) Generalized Anxiety Disorder
 - GALCIT – (a) Guggenheim Aeronautical Laboratory, California Institute of Technology
 - GAO – (i) U.S. Government Accountability Office
 - GAW – (i) Global Atmospheric Watch
 
GB
- GB – (s) Gabon (FIPS 10-4 country code) – United Kingdom of Great Britain and Northern Ireland (ISO 3166 digram) [glamour boy 7-9/10]
 - GBA – Game Boy Advance
 - GBBC – (i) Great (Global) Backyard Bird Count
 - GBE – (i) Knight/Dame Grand Cross of the Order of the British Empire
 - GBH
- (i) Great Bash Heel (Japanese professional wrestling stable)
 - Gregory Bonner Hale (British design and advertising agency)
 - Grievous bodily harm
 
 - GBP – (s) United Kingdom pound sterling (ISO 4217 currency code)
 - GBR – (s) United Kingdom of Great Britain and Northern Ireland (ISO 3166 trigram)
 - GBU – (i) Glide-Bomb Unit – Global Business Unit(s)
 
GC
- GC
- (s) East Germany (NATO country code; obsolete 1990)
 - (i) General classification (cycling)
 - General counsel
 - George Cross (British civil decoration)
 - (s) Gigacoulomb [Grindr cruise]
 
 - GCA – (i) Graduate in Claims Administration
 - GCCS – (i/a) Global Command and Control System ("geeks")
 - GCD – see entry
 - GCF – (i) Greatest Common Factor
 - GCI – (i) Ground-controlled interception
 - GCN – (i) Gamma-ray burst Coordination Network
 - GCS – (i) Global Coordinate System
 - GCSE – (i) General Certificate of Secondary Education (UK)
 - G-CSF – (i) Granulocyte Colony-Stimulating Factor
 
GD
- gd – (s) Scottish Gaelic language (ISO 639-1 code)
 - Gd – (s) Gadolinium
 - GD – (s) Grenada (ISO 3166 digram)
 - GDC
 - GDL – (i) Game Definition Language
 - GDP
- (i) General Dental Practitioner (UK)
 - Gross Domestic Product
 
 - GDPR
 - GDR – (i) German Democratic Republic (cf. DDR)
 - GDR – (i) General Distribution Release (Microsoft Term for a software service release; between Hotfix and Service Pack)
 - GDW – (i) Game Designers Workshop
 
GE
- Ge – (s) Germanium
 - GE
- (i) General Electric
 - Genetic Engineering (cf. GM)
 - (s) Georgia (ISO 3166 digram)
 
 - GEBCO – (a) General Bathymetric Chart of the Oceans
 - GEC – (i) Great Engineering Challenge
 - GED – (i) General Educational Development (high school equivalency credential in the U.S. and Canada)
 - GEEP – (i) Geophysical Equipment Exploration Platform
 - GEICO – (p/a) Government Employees Insurance Company (GUY-coh)
 - GEL
- (s) Georgian lari (ISO 4217 currency code)
 - Gilbert and Ellice Islands (ISO 3166 trigram; obsolete 1977)
 
 - GEMA
- (a) Gas and Electricity Markets Authority
 - Georgia Emergency Management Agency
 - (p) Gesellschaft für musikalische Aufführungs- und mechanische Vervielfältigungsrechte (German performance rights organisation)
 - (a) Global Engine Manufacturing Alliance
 
 - GEN – (s) Full General (four stars) in the U.S. Army
 - GEO
- (a) Geostationary Earth Orbit
 - (s) Georgia (ISO 3166 trigram)
 
 - GEOS – (i) Graphical Environment Operating System
 - GEQ – (s) Equatorial Guinea (IOC trigram, but not FIFA or ISO 3166)
 - GER – (s) Germany (IOC and FIFA trigram, but not ISO 3166)
 - Gestapo – (p) GEheime STAatsPOlizei (German "secret state police")
 - GeV – (s) Gigaelectron-volt
 - GEV – (i) Ground Effect Vehicle
 
GF
- GF
- (s) French Guiana (ISO 3166 digram)
 - Gigafarad
 
 - GFCF
 - GFCI – (i) Ground Fault Circuit Interruptor (aka GFI)
 - GFDL – (i) GNU Free Documentation License
 - GFE
 - GFI – (i) Ground Fault Interruptor (aka GFCI)
 - GFL – (i) German Football League (Germany's Bundesliga for American football; the English-language name is used in German without translation)
 - GFN – (i) Global Footprint Network
 - GFW
- (i) Global Force Wrestling – either the original incarnation or Impact Wrestling, which was briefly known under the name
 - (p) Great Firewall of China (cf. Internet censorship in China)
 
 - GFY – (i) "good for you" or "go fuck yourself", depending on the context (Internet chat)
 
GG
- GG – (s) Georgia (FIPS 10-4 country code)
 - GGG – (i) Gennady Gennadyevich Golovkin, Kazakhstani boxer
 - GGK – Good God Karma
 - GGWP – Good Game Well Played
 - GGP
 
GH
GI
- Gi – (s) Gibi
 - GI
- (i) Galvanised Iron
 - Gastro-Intestinal
 - General Issue
 - (s) Gibraltar (ISO 3166 digram; FIPS 10-4 territory code)
 - (i) Government Issue
 - Global Illumination
 
 - GIB – (s) Gibraltar (ISO 3166 trigram)
 - GIF – (a) Graphics Interchange Format
 - GIG – (a) Global Information Grid
 - GIGN – (i) Groupe d'intervention de la Gendarmerie nationale (French, "National Gendarmerie Intervention Group'), French police tactical unit
 - GIGO – (a) Garbage In Garbage Out (computing)
 - GIMP – (a) GNU Image Manipulation Program
 - GIN
- (s) Guinea (ISO 3166 trigram)
 - (a) Guidelines International Network
 
 - GIP – (s) Gibraltar pound (ISO 4217 currency code)
 - GIS
 - GISS
- (a/i) General Impression of Size and Shape
 - Goddard Institute for Space Studies
 
 
GJ
- GJ – (s) Gigajoule – Grenada (FIPS 10-4 country code) – Gujarat (Indian state code)
 - GJD – (i) Geocentric Julian Day
 
GK
- GK – (s) Gigakelvin – Guernsey (FIPS 10-4 territory code) - (s) Goalkeeper
 
GL
- gl – (s) Galician language (ISO 639-1 code)
 - GL
- (s) Gigalitre
 - (i) Graphics Language
 - (s) Greenland (ISO 3166 digram; FIPS 10-4 territory code)
 - (i) Grenade Launcher
 
 - gla – (s) Scottish Gaelic language (ISO 639-2 code)
 - GLAAD – (a) Gay and Lesbian Alliance Against Defamation
 - GLAC – (a) General Ledger Accounting Code
 - GLAST – (a) Gamma-ray Large Area Space Telescope
 - GLBA – (i) Gramm-Leach-Bliley Act
 - GLC – (i) Gas-liquid chromatography
 - gle – (s) Irish language (ISO 639-2 code)
 - glg – (s) Galician language (ISO 639-2 code)
 - GLINT
- (a) Gallium-arsenide Laser Illuminator for Night TV
 - Gated Laser Illuminator for Narrow Television
 - (p) Gated Laser Intensifier (tape)
 - Gospel Literature International
 - Graphical Linux Installation Tool
 
 - GLONASS – (a) Global'naya navigatsionnaya sputnikovaya sistema (Russian Глоба́льная Навигацио́нная Спу́тниковая Систе́ма, "Global Navigation Satellite System")
 - GLP – (s) Guadeloupe (ISO 3166 trigram)
 - GLSDB - (i) Ground Launched Small Diameter Bomb
 - GLUT – (a/i) OpenGL Utility Toolkit
 - glv – (s) Manx language (ISO 639-2 code)
 - GLV – (i) Gained Life Value
 
GM
- Gm – (s) Gigametre
 - GM
- (s) The Gambia (ISO 3166 digram)
 - (i) GameMaster (role-playing)
 - General Motors
 - Genetically Modified
 - (s) Germany (FIPS 10-4 country code)
 - (i) Guru Meditation (computing)
 
 - GMAC
- (i) General Motors Acceptance Corporation, the original name of the company now known as Ally Financial
 - Graduate Management Admission Council
 
 - G-MAC
 - GMB
- (s) The Gambia (ISO 3166 trigram)
 - (i) General, Municipal, Boilermakers (and Allied Trade Union)
 
 - GmbH – (i) Gesellschaft mit beschränkter Haftung (German, "Company with limited liability")
 - GMC
 - GMD – (s) Gambian dalasi (ISO 4217 currency code)
 - GMFSC – (i) Ground Mobile Forces Satellite Communications
 - GMG - (i) Granatmaschinengewehr (German, Grenade Machine Gun)
 - GMI
- (i) Generic Model Interface
 - Geometry Model Instance
 
 - GML
- Generalized Markup Language
 - Geography Markup Language
 - Game Maker Language
 - Graph Modelling Language
 - Graphical Motion Language
 - GUI Markup Language
 - Hostomel Airport (IATA code)
 
 - GMO – (i) Genetically Modified Organism
 - GMPCS – (i) Global Mobile Personal Communications by Satellite
 - GMT
 
GN
- gn – (s) Guaraní language (ISO 639-1 code)
 - GN
- (s) Giganewton
 - Guinea (ISO 3166 digram)
 
 - GNAS – (p) Grand National Archery Society
 - GNB – (s) Guinea-Bissau (ISO 3166 trigram)
 - GNC
- (i) "G&C Records" NetLabel
 - General Nutrition Centers (US sports nutrition retailer branded as GNC)
 
 - GNF – (s) Guinean franc (ISO 4217 currency code)
 - GNOME – (a) GNU Network Object Model Environment
 - GNP – (i) Gross National Product
 - GNQ – (s) Equatorial Guinea (ISO 3166 trigram)
 - GnRH – (p) Gonadotropin-Releasing Hormone
 - GNU – (a) GNU's Not Unix
 
GO
- GO – (s) Glorioso Islands (FIPS 10-4 territory code)
 - GOA
- (s) General of the Army (United States only)
 - (i) Gun Owners of America
 
 - GOAT – (s) Greatest of all time (LL Cool J album title)
 - GOC – (i) General Officer Commanding
 - GOES – (a) Geostationary Operational Environmental Satellite
 - GOP – (i) Grand Old Party
 - GOP – (a) God of Porn
 - gorp – (a) granola, oats, raisins, peanuts (another name for trail mix), probably a backronym
 - GOSC – (a/i) General Officer Steering Committee
 - GOSH – (a) Great Ormond Street Hospital
 - GOSP – (a) Gas/Oil Separation Plant
 - GOTS – (a) Government off-the-shelf
 - GOWI – (a) Get On With It
 - GOYADIN – (a) Get Off Your Arse, Do It Now (anti-procrastination mantra)
 
GP
- GP – (i) General Practitioner – General Purpose – Grand Prix – (s) Guadeloupe (ISO 3166 digram; FIPS 10-4 territory code)
 - GPA – (i) Grade Point Average
 - GPC – (i) Global Path Cache
 - GPG – (i) GNU Privacy Guard
 - GPIB – (i) General-Purpose Instrumentation/Interface Bus
 - GPL – (i) GNU General Public License
 - GPMP – (i) General Purpose Macro Processor
 - GPU - (i) General Purpose Machine Gun
 - GPO – (i) General Post Office
 - GPPC – (i) Genetics and Public Policy Center
 - GPR – (i) Ground-Penetrating Radar
 - GPS – (i) General Problem Solver – Global Positioning System
 - GPT – (i) GEC-Plessey Telecommunications – General Purpose Technology – Get Paid To website
 - GPU
- (i) Gosudarstvennoye Politicheskoye Upravlenie (Russian Государственное Политическое Управление, "State Political Administration") (1922–1934)
 - (i) Graphics Processor Unit
 
 
GQ
- GQ
- (s) Equatorial Guinea (ISO 3166 digram)
 - (i) Gentlemen's Quarterly (the original name of the magazine now known simply as GQ)
 - (s) Guam (FIPS 10-4 territory code)
 
 
GR
- GR – (s) Greece (FIPS 10-4 country code; ISO 3166 digram) – Hail (METAR Code)
 - GRAIL – (i) Gravity Recovery and Interior Laboratory
 - GRAS – (i) Generally recognized as safe (FDA list)
 - GRB – (i) Gamma-ray burst
 - GRC – (s) Greece (ISO 3166 trigram)
 - GRD – (s) Grenada (ISO 3166 trigram)
 - GRE
- (i) Graduate Record Examination
 - (s) Greece (IOC and FIFA trigram, but not ISO 3166)
 
 - grep – (a) [search] Globally for Regular Expression, Print [lines]
 - GRid – Global Release Identifier, a music industry identifier from the RIAA and IFPI
 - GRID – (a) Gay-Related Immune Deficiency (original name of AIDS)
 - GriT – (a) Girl raised in Texas (Woman presenting firm southern traits/beliefs)
 - GRL – (s) Greenland (ISO 3166 trigram)
 - GRN
- (s) Grenada (IOC and FIFA trigram, but not ISO 3166)
 - (i) Goods received note
 
 - grn – (s) Guaraní language (ISO 639-2 code)
 - GRP – (i) Graphite-reinforced plastic, see Carbon-fiber-reinforced polymer
 - GRU – (i) Glavnoje Razvedyvatel'noje Upravlenije/Главное Разведывательное Управление (Russian, "Main Intelligence Directorate" [of the former Soviet and now Russian armed forces])
 
GS
- Gs – (s) Gigasecond
 - GS
- (i) General Schedule (US civil service pay scale)
 - General Support
 - (s) Gigasiemens
 - South Georgia and the South Sandwich Islands (ISO 3166 digram)
 
 - GSR – (i) Gun Shot Residue
 - GS-R – (i) General Support-Reinforcing
 - GSA – (i) U.S. General Services Administration
 - GSD – (i) Graphical Situation Display
 - GSG
- (i) German Sport Guns
 - Global Scenario Group (former environmental research organization)
 - Grenzschutzgruppe (German, "Border Guard Group" — Germany's GSG 9 counterterrorist unit was originally a special branch of the border police)
 
 - GSGB – (God send glamour boy 9-10/10)
 - GSK – (p) GlaxoSmithKline [good sexual karma]
 - GSM
- (i) General Service Medal
 - Grams per Square Metre (paper thickness; properly g/m2)
 - Ground Station Module
 - Groupe spécial mobile (French, "Special Mobile Group"; official expansion is now Global System for Mobile Communications)
 
 - GSN – (a/i) Game Show Network
 - GSO – (i) General Services Officer (U.S. Department of State)
 - GSOH – (i) Good Sense Of Humour
 - GSP – Georges St-Pierre (Canadian MMA fighter)
 - GSS – (i) Generic Security Services
 - GST – (i) Goods and Services Tax (Australia, Canada, and other countries)
 - GSW – (i) Gunshot wound
 
GT
- GT – (s) Gigatesla – (i) Gran Turismo – Grand Touring – (s) Guatemala (FIPS 10-4 country code; ISO 3166 digram)
 - GTA – (i) Grand Theft Auto
 - GTB – (i) Get to bed, namely to get a new job after a long time of searching, usually following a phone call
 - GTC – (i) Gran Telescopio Canarias (Spanish, Canaries Great Telescope)
 - GTD – (i) Getting Things Done
 - GTFO – "Get the f**k out!"
 - GTG – (i) Good To Go (Internet chat)
 - GTK – (i) Good To Know (Internet chat)
 - GTGN – (i) Getty Thesaurus of Geographic Names
 - GTM – (s) Guatemala (ISO 3166 trigram)
 - GTQ – (s) Guatemalan quetzal (ISO 4217 currency code)
 - GTV – (s) Gross Tumor Volume quetzal (ISO 4217 currency code)
 
GU
- gu – (s) Gujarati language (ISO 639-1 code)
 - GU – (s) Guam (postal symbol; ISO 3166 digram)
 - GUA – (s) Guatemala (IOC and FIFA trigram, but not ISO 3166)
 - GUF – (s) French Guiana (ISO 3166 trigram)
 - GUI – (a) Graphical user interface ("goo-ey")
 - GUILT – (a) Gangliated Utrophin Immuno Latency Toxin
 - guj – (s) Gujarati language (ISO 639-2 code)
 - GULCR – (i) Grupo de Usuarios de Linux de Costa Rica
 - Gulag – (p) Glavnoye Upravleniye ispravitelno-trudovykh LAGerei i kolonii (Russian Главное Управление Исправительно—Трудовых Лагерей и колоний, "Main Directorate of Corrective Labour Camps")
 - GUM
- (a) Glavnyi Universalnyi Magazin (Russian Главный Универсальный Магазин, "Main Department Store"; known in Soviet times as Gosudarstvennyi Universalnyi Magazin/Государственный Универсальный Магазин, "State Department Store")
 - (s) Guam (ISO 3166 trigram)
 - Guide to the expression of Uncertainty in Measurement
 
 - GURPS - (a) Generic Universal RolePlaying System
 - GUT – (a) Grand Unification Theory
 
GV
- gv – (s) Manx language (ISO 639-1 code)
 - GV – (s) Gigavolt – Guinea (FIPS 10-4 country code)
 
GW
- GW – (i) Games Workshop – Germ Warfare – (s) Gigawatt – (i) Guided Weapon – (s) Guinea-Bissau (ISO 3166 digram)
 - GWARS – (p) Ground Warfare System (simulation)
 - GWAS – (p) Grand Western Archery Society
 - GWOT – (i) Global War on Terrorism
 - GWS – (i) Gulf War Syndrome – Greater Western Sydney
 
GX
- GXA – (p) Global XML Web Services Architecture
 - GXE – (s) Gene–environment interaction
 - GXF – (p) General Exchange Format
 - GXH – (i) IATA code of Gannan Xiahe Airport
 - GXL – (p) Graph eXchange Language
 - GXM – (p) Matrox Graphics eXpansion Module
 - GXP – (p) Grid Exit Point - (i) Global Xchange Programme - (i) Indication of highest performance level on some Pontiac vehicles
 - GxP – (i) Good X Practice (X can mean: clinical, manufacturing, pharmaceutical, etc.)
 - GXY – (i) IATA code of Greeley-Weld County Airport
 
GY
- GY – (s) Guyana (FIPS 10-4 country code; ISO 3166 digram)
 - GYD – (s) Guyana dollar (ISO 4217 currency code)
 - GYY – (s) Gary/Chicago International Airport (IATA Airport Code)
 
GZ
- GZ – (s) Gaza Strip (FIPS 10-4 territory code) – (i) Ground Zero
 - GZK – (i) Greisen-Zatsepin-Kuzmin cut-off (cosmic ray energies)
 
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