| Abbreviation | Definition |
|---|---|
| GLSA | Great Lakes Shrine Association |
| GLSA | Great Lakes Surfing Association |
| GLSA | Greater Lake Sylvia Association |
| GLSA | Greater Libertyville Soccer Association |
| GLSA | Group Legal Services Association |
| GLSBGA | Great Lakes Sugar-Beet Growers Association |
| GLWA | Geneva Lake Women's Association |
| GLWA | Greek Local Women's Association |
| GMA | Geosynthetic Materials Association |
| GMA | Grocery Manufacturers Association |
| GMA | Guilford Merchants Association |
| GMAA | Graduate Management Association of Australia |
| GMBA | General Missionary Benevolent Association |
| GMBA | Greater Merrifield Business Association |
| GMBA | Greater Milwaukee Bowling Association |
| GMBA | Greater Milwaukee Bridge Association |
| GMBA | Green Mountain Baptist Association |
| GMBA | Grenada Mas Band Association |
| GMCA | German Mosquito Control Association |
| GMFA | Gibraltar Model Flying Association |