| Abbreviation | Definition |
|---|---|
| GFA | Gargoyles Fan Artists Guild |
| GGC | Great Group Cruise |
| GGC | Griffin Gentlemen Connection |
| GGG | Good, Giving, and Game |
| GLOL | George's League Of Lego |
| GLSCC | Greal Lakes Sports Car Club |
| GLW | Great Lakes Wargamers |
| GLWC | Great Lakes Wargamers Coalition |
| GLWC | Great Lakes Wrecking Crew |
| GM | Game Masters |
| GMG | Good Magic Guild |
| GMMC | Grant MacEwan Mountain Club |
| GOD | Game On Disc |
| GOF | Group Of Friends |
| GOW | Gears Of War |
| GRC | Gold Rush Chapter |
| GRID | Global Rave Information Database |
| GRS | German Railway Society |
| GSA | Gameshark Advanced |
| GSA | Girl Scouts of the USA |