| Abbreviation | Definition |
|---|---|
| GNBA | Generation Next Basketball Association |
| GNBA | Good News Broadcasting Association |
| GNBA | Greater Niagara Baseball Association |
| GNMA | Government National Mortgage Association |
| GNTA | Gauteng North Tennis Association |
| GOA | Georgia Optometric Association |
| GOA | Guyana Olympic Association |
| GOBA | Greater Orlando Baptist Association |
| GOBA | Greater Orlando Builders Association |
| GOCA | Global Offset and Countertrade Association |
| GOCA | Greater Olney Civic Association |
| GOPA | Gloucestershire Older Persons Association |
| GOPA | Goud Officials and Professionals Association |
| GOSA | Geyser Observation and Study Association |
| GOSA | Greater Ohio Showman's Association |
| GOSA | Greater Ohio Showmen's Association |
| GOSA | Groton Open Space Association |
| GOTA | Georgia Occupational Therapy Association |
| GPAA | Gold Prospectors Association of America |
| GPAD | Gene Product Association Data |