| Abbreviation | Definition |
|---|---|
| GCNA | Greater Cleveland Nurses Association |
| GCNA | Grenada Cooperative Nutmeg Association |
| GCOCA | Gloucester Cathedral Old Choristers Association (UK) |
| GCPA | Genesee County Pharmacists Association |
| GCRA | Gloucester Cumberland Ringette Association |
| GCRA | Greater Cabarrus Reading Association |
| GCRA | Greater Columbus Rowing Association |
| GCRTA | Grayson County Retired Teachers Association |
| GCSA | Gordon College Student Association |
| GCSA | Graves County Soccer Association |
| GDA | Gloucestershire Deaf Association |
| GDAA | Greater Dayton Apartment Association |
| GDAA | Green Deal Advisor Association |
| GDAR | Guelph and District Association of REALTORS |
| GDAV | Guide Dog Association of Victoria |
| GDCA | Global Digital Currency Association |
| GDFA | Ghana Deaf Football Association |
| GDKA | German and Dutch Konkani Association |
| GDLA | Georgia Defense Lawyers Association |
| GDLA | Georgia Distance Learning Association |