| Abbreviation | Definition |
|---|---|
| GTS | Grand Touring Spyder |
| GTS | Ground Transportation Services |
| GTS | Group Transportation Services |
| GTS | Guaranteed To Start |
| GTSA | Ground Transportation Staging Area |
| GTSE | Green Transportation Summit and Expo |
| GTSE | Green Transportation Summit Expo |
| GTT | Gone To Texas |
| GTT | Grand Turing Turbo |
| GTTA | Greater Toronto Transportation Authority |
| GTTC | Greater Toronto Transportation Conference |
| GTTDI | Grand Touring Turbo Diesel Injection |
| GTTS | Global Transportation Tracking System |
| GTU | Greenwich Transportation Underwriters |
| GTU | Ground Transportation Unit |
| GTV | Ground Test Vehicle |
| GTW | Gross Trailer Weight |
| GUR | Greyhound Underground Railroad |
| GUS | Glendale Urban Shuttle |
| GUV | Gaper Utility Vehicle |