G General audiences (filme de ação)
G Gravity
GA Gamblers Anonymous
GA General Assembly
GA General Average
GA General of the Army
GA Georgia
GAAP Generally Accepted Accounting Principles
GAB Group Audio Bridging (Telefonia)
Gaia Earth's self-sustaining Biosphere 
GAN Global Area Network
GAO General Accounting Office (Governo americano)
GAR Grand Army of the Republic
GARR Gruppo Arminizzazione Rete por la Ricerca (Italian Research Network Harmonization Group)
GAS Get-Away Special (Espacial)
GATT General Agreement on Tariffs and Trade
GAW Guaranteed Annual Wage
GAW Guarenteed Annual Wage
GB Gangbusters
GB GigaByte
GB Great Britain
GBIP General Purpose Interface Bus
GBT Green Bank Telescope (Espacial)
GC Garbage Collection (LISP)
GC Gas Chromatograph (ou Chromatography)
GCA Ground Controlled Approach
GCC Gnu C Compiler
GCD Ground Controlled Descent
GCL Graphics Command Language
GCM General Court Martial
GCR Group-Coded Recording (fita magnetica, 6250 bpi)
GCT Greenwich Civil Time
GCVS General Catalog of Variable Stars (Espacial)
GDB Gnu DeBugger
GDP Gross Domestic Product
GDS Great Dark Spot (Espacial)
GE General Electric
GEM Giotto Extended Mission (Espacial)
GEM Graphics Environment Manager
GEO Geosynchronous Earth Orbit (Espacial)
GHQ General HeadQuarters
GHRS Goddard High Resolution Spectrograph (em HST) (Espacial)
GHz Giga HertZ (unidade de freqüência, 1.000.000.000 ciclos por segundo)
GI Galvanized Iron
GI Gastro Intestinal (como em superior GI)
GI General Issue (assunto geral)
GI Government Issue
GID Group ID [UNIX]
GIF Graphics Interchange Format
GIGO Garbage In Garbage Out
GIN Graphics INput
GISS Goddard Institute for Space Studies
GKS Graphical Kernel Standard
GKS Graphics Kernel System
GM Game Master
GM General Manager
GM General Motors [Nome de companhia, Automobilistica]
GM Guided Missile
GMBH Gesellschaft Mit Beschraenkter Haftung
GMC Giant Molecular Cloud (Espacial)
GMD Gesellschaft f\:ur Mathematik und Datenverarbeitung (German Institute for Mathematics and Data Processing)
GMRT Giant Meter-wave Radio Telescope (Espacial)
GMT Greenwich Mean Time (também chamado UT)
GNP Gross National Product
GNU GNU's Not Unix
GOES Geostationary Orbiting Environmental Satellite (Espacial)
GOES Geostationary Orbiting Environmental Satellites (Espacial)
GOSIP Government Open Systems Interconnection Profile (chamada para obtenção governamental de produtos ISO/CCITT)
GOSIP Government OSI Profile
GP General Practitioner
GP General Purpose (RR engines and origin of Jeep) [Ferroviária, Automobilistica]
GPC General Purpose Computer (Espacial)
GPI Graphics Programming Interface
GPIB General Purpose Interface Bus
GPIB General-Purpose Interface Bus
GPL GNU General Public Licence
GPO General Post Office
GPO Government Printing Office
GPS Global Positioning System
GPS Global Positioning System (Espacial)
GQ General Quarters
GRB Gamma Ray Burst(er)
GREP Global Regular Expression Print, g/re/p, (UNIX comando)
GREP Global Regular Expression Print [UNIX]
GRO Gamma Ray Observatory (Espacial)
GRS Gamma Ray Spectrometer (em Observador de Marte) (Espacial)
GRS Great Red Spot (Espacial)
GS General Schedule
GS Glide Slope
GSA General Services Administration
GSA General Services Adminstration (Governo americano)
GSA Girl Scouts of America
GSBCA General Services administration Board of Contract Appeals
GSC Guide Star Catalog (for HST) (Espacial)
GSFC Goddard Space Flight Center (Greenbelt, MD) (NASA, espacial)
GSI Gesellschaft f\:ur Schwerionenforschung (German Federal Research Institute for Heavy Ion Research)
GSM Global System Mobile
GSM Groupe Speciale Mobile (Committee Designing preceding)
GSTS Ground-based Surveillance and Tracking System
GT Gross Ton
GTE General Telephone and Electric (nome de companhia)
GTO Geostationary Transfer Orbit (Espacial)
GTSI Government Technology Services, inc.
GUI Graphical User Interface
GW Gamma World
GWEN Ground Wave Emergency Network
GWM Generic Window Manager [X]
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