| Acronym | Definition |
|---|
| GBT | Gotthard Base Tunnel (railway tunnel; Switzerland) |
| GBT | Global Business Today (Charles W. L. Hill books) |
| GBT | Green Bank Telescope (Pocahontas County, West Virginia) |
| GBT | Gigabyte Technology |
| GBT | Glycine Betaine |
| GBT | Gravity Belt Thickener (wastewater treatment) |
| GBT | Great Bay Temple (gaming) |
| GBT | Grupo Barra Traductores ( Spanish: Barra Group Translators; Mexico) |
| GBT | General Business Technology |
| GBT | Gay/Bisexual/Transgender |
| GBT | Gravity Base Tank (energy production) |
| GBT | Ground Based Tower (telecommunications) |
| GBT | Golden Belt Telephone (Rush Center, KS) |
| GBT | Grande Boucle Tremblant (trail; Canada) |
| GBT | Group on Basic Telecommunications |
| GBT | Ground-Based Transceiver |
| GBT | God Bless Texas |
| GBT | Great Books Tutorial |
| GBT | Generalized Bayesian Theorem |
| GBT | Getting Better Together Lt. (UK) |
| GBT | Generalized Balanced Ternary |
| GBT | Gary B Trudeau (author of Doonesbury cartoon) |