| Acronym | Definition |
|---|
| GAB | Government Accountability Board (Wisconsin, USA) |
| GAB | Gabon (ISO Country code) |
| GAB | Great American Bash (wrestling) |
| GAB | Graded Aggregate Base (road construction material) |
| GAB | Global Advisory Board (various organizations) |
| GAB | Gimme A Break |
| GAB | General Arrangements to Borrow |
| GAB | Great Artesian Basin (Australia) |
| GAB | Global Address Book |
| GAB | Guichet Automatique de Banque (French: Automatic Teller Machine) |
| GAB | Great American Ballpark (Cincinnati, Ohio) |
| GAB | Games and Amusement Board (Philippines) |
| GAB | General Adjustment Bureau (GAB Robins North America, Inc.) |
| GAB | Ghana Association of Bankers (est. 1980) |
| GAB | Group Access Bridging |
| GAB | Global Audio Broadcast |
| GAB | Guojia Anquan Bu (Chinese Ministry of State Security) |
| GAB | Gold Antique Brush (color) |
| GAB | Grenada Association of Beekeepers |
| GAB | Government Approval Board (approves GDSSII software version release contents) |
| GAB | Sir Geoffrey Arthur Building (Pembroke College, University of Oxford) |
| GAB | Grand Australasian Banner (Royal Antediluvian Order of Buffaloes) |