| Abbreviation | Definition |
|---|---|
| GC | Guilherme De Carvalho |
| GCG | Geoffrey C. Grabowski, computer game developer |
| GD | George Dillard, Minister |
| GD | Glenn Danzig, songwriter and musician |
| GD | Gunga Din |
| GE | George and Elizabeth, King and Queen of England |
| Gego | Gertrude Goldschmidt |
| GEM | Glenn E. Marshall |
| GERMANY | Gandhi |
| GFW | GordonFred West |
| GG | Galileo Galilei |
| GG | George Granville |
| GG | Guiseppi Gucci |
| GGG | Gennady Gennadyevich Golovkin |
| GH | George Harrison |
| GHS | George Herbert Stancer |
| GIFC | Gilligan's Island Fan Club |
| GJ | George Jefferson |
| GJ | George Jenkins, actor |
| GK | Gabriel Knight |