| Abbreviation | Definition |
|---|---|
| GABBY | Gabrielle |
| GABE | Gabriel |
| GAN | Great Aunt Nancy |
| GATOR | Genuine Accurate Trustworthy Origin and Readability |
| GB | Gardiner Bryant |
| GB | George Bernard |
| GB | Grandpa Ben |
| GBTB | Good Boy Tom Boy |
| GD | George David |
| GDG | Get Dollars Gangster |
| GEEKBEAK | Circus sideshow performer who bites off the heads of chickens. |
| GERRY | Gerald |
| GH | Genevieve Hannelius |
| GH | Ghulam |
| GH | Good Housekeeping |
| GHB | Grand Highblood |
| GHZ | Großherzog |
| GI | Greta Ilieva |
| GIANLE | 'Gianle', pronounced phonetically; (? ? ? ?) is the abbreviation of the Italian name 'Gianleandro': |
| GIFS | Good Info For Some |