| Acronym | Definition |
|---|
| GTB | Gran Turismo Berlinetta |
| GTB | Google Tool Bar |
| GTB | Guaranty Trust Bank (Nigeria) |
| GTB | Global Transaction Banking |
| GTB | Grand Traverse Band (of Ottawa and Chippewa Indians; Michigan) |
| GTB | Great Tythe Barn (UK) |
| GTB | Gestion Technique du Bâtiment (French: Technical Management of Buildings) |
| GTB | Global Trust Bank |
| GTB | Ghana Tourist Board |
| GTB | Go To Bed |
| GTB | General Terms of Business |
| GTB | Greg the Bunny (TV show) |
| GTB | Globally Threatened Bird |
| GTB | Gay Teen Boys (band) |
| GTB | Gangwon Television Broadcasting (South Korea) |
| GTB | Global Telecom Brokers (This is the nick name for the company) |
| GTB | Ground Turn Back (aviation) |
| GTB | Grow the Business |
| GTB | Golden Thief Bug (Ragnarok) |
| GTB | Gran Tourismo Berlinetta (Ferrari) |
| GTB | Ground Training Branch |
| GTB | Good Time Boys (movie) |
| GTB | Groupe de Travail Bruxelles 1952 |
| GTB | Grand Théâtre de Bordeaux (French: Grand Theatre of Bordeaux; Bordeaux, France) |
| GTB | General Tool Box |
| GTB | Going To the Bathroom |
| GTB | Grand Tourer Bilstein (Subaru Legacy model) |
| GTB | Guilderland Town Band (Guilderland, NY) |
| GTB | Greater Trochanteric Bursitis (medical disorder) |
| GTB | Grid Toolbox (IBM) |
| GTB | Greater-The-Better (principle) |
| GTB | Guidance Telemetry Building |
| GTB | Galactic Terran Bomber (gaming, Descent: Freespace) |
| GTB | Gas Turbine Bulletin (mechanics) |
| GTB | Giant Tiger Boutique (Canadian discount store) |