| Acronym | Definition |
|---|
| GBOS➣Gambia Bureau of Statistics |
| GBOS➣GB (Great Britain) Overprints Society (UK) |
| GBOS➣Great Basin Outdoor School (Reno, NV) |
| GBOS➣Girdwood Board of Supervisors (Alaska) |
| GBOS➣Great Bay Osprey Stewards (New Hampshire) |
| GBOS➣Green Barn Orchid Supplies (Delray Beach, FL) |
| GBOS➣Ground-Based Observational Facilities |