| Abbreviation | Definition |
|---|---|
| GMRA | Green Mountain Racquetball Association |
| GMS | Games Master System |
| GMSC | Gulf Masters Swim Committee |
| GMSS | General Manager Search Subcommittee |
| GMT | Get Moving Today |
| GMT | Guyot Motorcycle Team |
| GN | Gaming Network |
| GN | Grand National |
| GN | Great Nordic |
| GNAS | Grand National Archery Society |
| GNBF | German Natural Bodybuilding and Fitness |
| GNDA | Greater Nashville Darting Association |
| GNE | Game Neverending |
| GNN | Gaming Network Nigeria |
| GNP | Games Not Picked |
| GNS | Game Name Server |
| GNTC | Groupement National des Transports Combinés |
| GO | Ground Out |
| GOA | Gamers Of America |
| GOAL | Giving Opportunities For Athletes To Learn |