| Abbreviation | Definition |
|---|---|
| GK | George Katsimpiris |
| GL | Gary Lee |
| GL | Gelfond Lifschitz |
| GL | George Lambert |
| GL | George Lansbury |
| GL | George Lucas |
| GL | Green Lantern |
| GM | Geiger Mueller |
| GM | George Melies |
| GM | George Michael |
| GM | Gil Mosko |
| GM | Grand Marshal |
| GMAT | Gaand Mein Apar Tension |
| GMC | Greyson Michael Chance |
| GN | Greg Norman |
| GNDJ | Guru Nanak Dev Ji |
| GOB | George Oscar Bluth |
| GP | Gary Polland |
| GP | Gomer Pyle |
| GP | Gordon Peterson |