| Acronym | Definition |
|---|
| GCAC | Gulf Coast Athletic Conference |
| GCAC | Greater Columbus Arts Council |
| GCAC | Generic Connection Admission Control |
| GCAC | Garde Côtière Auxiliaire Canadienne (French: Canadian Coast Guard Auxiliary) |
| GCAC | Golf Course Advisory Committee (various locations) |
| GCAC | Generic Call Admission Control (Sprint-ATM) |
| GCAC | Genoa City Athletic Club (The Young and the Restless; TV daytime drama) |
| GCAC | Glacier Country Avalanche Center, Inc. (Montana) |
| GCAC | Glaucoma Crónico de Ángulo Cerrado |
| GCAC | Gold Coast Arts Center (Australia) |
| GCAC | Greater Capital Area Chapter of the American Nurses Association (California) |
| GCAC | Global Connection Admission Control |
| GCAC | Gwynedd and Clwyd Association of Craftworkers (UK) |