| Abbreviation | Definition |
|---|---|
| GAYC | Georgia Association on Young Children |
| GBA | Gainesville Basketball Association |
| GBA | Geoprofessional Business Association |
| GBA | Girls Basketball Association |
| GBA | Global Battle Association |
| GBA | Greece Basketball Association |
| GBA | Grunt By Association |
| GBA | Guilt by Association |
| GBAA | Great Basin Anthropological Association |
| GBAB | Gamefowl Breeders Association of Bohol |
| GBCA | Galveston Bay Cruising Association |
| GBCA | General Building Contractors Association |
| GBCA | German Brown Coal Association |
| GBCA | Granite Bay Community Association |
| GBCA | Greater Boston Concierge Association |
| GBPA | Gettysburg Battlefield Preservation Association |
| GBPA | Ghana Book Publishers Association |
| GBPA | Global Blockchain Pioneers Association |
| GBPPA | Greater Boston Post Polio Association |
| GBPPA | Green Bay Professional Police Association |