| Acronym | Definition |
|---|
| G | Gram |
| G | Grin (used in chat and email) |
| G | Giga- (a prefix meaning 1 billion) |
| G | General Audiences (movie rating) |
| G | Gravitational acceleration (physics) |
| G | General |
| G | Group (algebraic object in mathematics) |
| G | Group (as in G-8, Group of 8 Industrialized Nations) |
| G | Good (numismatics; 2nd worst condition of coin) |
| G | Good (philatelic auction term) |
| G | Green |
| G | Gas |
| G | Gold (rollplaying games) |
| G | Ground |
| G | Golf |
| G | Gross |
| G | Guatemala |
| G | Guard (basketball) |
| G | Gate (transistor; electronics) |
| G | Gilbert |
| G | Guilty |
| G | Gravity |
| G | Gamma |
| G | Gauge (syringes) |
| G | Glasgow (postcode, United Kingdom) |
| G | Genus (mathematics) |
| G | Gin |
| G | Graz (Austrian city) |
| G | Graphite |
| G | Galway (Irish car registration) |
| G | Glycine (amino acid) |
| G | Glycoprotein (virus protein) |
| G | Gauss (magnetic flux density) |
| G | Games Played (baseball) |
| G | Glider (US Military aircraft vehicle type designation) |
| G | Goalie (hockey, soccer, etc.) |
| G | Guanine (DNA base) |
| G | Conductance |
| G | Gbps |
| G | Goals Scored (various sports) |
| G | One Thousand Dollars (common US slang) |
| G | Gravimetric |
| g | Gluon |
| G | Gravida (number of pregnancies) |
| G | Gravida (gynecology) |
| G | Gorod (Russian, town/city; used in postal addresses) |
| G | Gamma Hydroxybutyrate |
| G | Gibbs Free Energy (thermodynamics) |
| G | Gillette Company (NYSE symbol) |
| G | Paraguayan Guarani (national currency) |
| G | Dutch Guilder (national currency) |
| G | Gefreiter (German) |
| G | Eastern Quebec (Canada Post designation) |
| G | General Intelligence Factor (psychology/psychometrics) |
| G | Gangsta/Gangster |
| G | Graffenberg (spot) |
| G | Ginoo (Filipino: Mr. or Sir) |
| G | Insured Letter (Scott Catalogue prefix; philately) |
| G | Giesma (form of chromosome banding) |
| G | Guilford Gravure (philatelic prefix on stamp coils) |
| G | Federal Reserve Bank of Chicago, Illinois (designates original point of circulation of a dollar bill) |
| G | Issued Traffic Citation (Alabama Public Safety radio code) |
| G | Undenominated United States Stamp (32 cents, introduced 1 Jan 1985) |
| G | Gerard Thematic Catalog (music, Italian) |
| G | Generator, Tachometer Generator, Exciter, or Rotating Amplifier |