| Acronym | Definition |
|---|
| GCAB | Global Community Advisory Board (HIV/AIDS) |
| GCAB | Global Consumer Advisory Board |
| GCAB | Global Committee of Argentina Bondholders |
| GCAB | Groupement des Commerçants et Artisans de Blonay (French: Blonay Shopkeepers and Craftsmen Group; Switzerland) |
| GCAB | Gloucestershire County Association for the Blind (UK charity) |
| GCAB | Groupement Carburant Aviation du Bourget (French aviation fuel group) |
| GCAB | Gibraltar Citizens Advice Bureau |
