| Acronym | Definition |
|---|
| GB | Gabon (Africa) |
| GB | Gila Bend (Arizona) |
| GB | Gilgit-Baltistan (region; Pakistan) |
| GB | Governing Board |
| GB | Governing Body |
| GB | Grand Bend (Ontario, Canada) |
| GB | Grand Blanc (Michigan) |
| GB | Green Bag (artillery propellant) |
| GB | Green Bay (Wisconsin) |
| GB | Green Beret |
| GB | Ground-Based |
| GB | Group Buffer (US DoD) |
| GB | Guo Biao 2312-80 (Chinese government standard Chinese character encoding scheme) |
| GB | Sarin (nerve agent) |