| Abbreviation | Definition |
|---|---|
| GMFA | Greater Moncton Football Association |
| GMFA | Guelph Minor Football Association |
| GMJBA | Green Mountain Junior Baseball Association (Lakewood, CO) |
| GMLA | Greater Midwest Lenders Association |
| GMLA | Groton Mystic Lacrosse Association |
| GMOA | Government Medical Officers Association |
| GMRA | Green Mountain Repeater Association |
| GMSA | Georgia Mountain Shooting Association |
| GMSA | Global Management Student Association |
| GMSA | Globally Minded Student Association |
| GMTA | Gainesville Music Teachers Association |
| GMTA | Georgia Motor Trucking Association |
| GMTA | Greater Madison Tennis Association |
| GNA | Genuine Networking Association |
| GNA | Georgia Numismatic Association |
| GNA | Gunstock Nordic Association |
| GNAA | Great Neck Athletic Association |
| GNAA | Greater Nashville Apartment Association |
| GNAAS | Ghana National Association of Adventist Students |
| GNAP | Greeting Name Association Purpose |