| Acronym | Definition |
|---|
| GCNA | Germ Cell Nuclear Antigen (genes) |
| GCNA | Guild of Carillonneurs in North America |
| GCNA | Guarantee Company of North America (est. 1872; Canada) |
| GCNA | Greater Cleveland Nurses Association (Cleveland, OH) |
| GCNA | Galère Club Nautique Auvernier (Swiss sailing club) |
| GCNA | Grenada Cooperative Nutmeg Association |
| GCNA | Groupes de Compagnies Nomades d'Algérie (French: Groups of Nomadic Companies of Algeria) |
| GCNA | Gloucestershire County Netball Association (est. 1956; UK) |
| GCNA | Golden City Netball Association (Australia) |