| Acronym | Definition |
|---|
| GTC | General Teaching Council (UK) |
| GTC | Gateway Technical College (Wisconsin) |
| GTC | Good 'Til Canceled |
| GTC | Good 'Til Cancelled (eBay selling method) |
| GTC | Gran Telescopio Canarias |
| GTC | Government Technology Conference |
| GTC | Gestion Technique Centralisée (Industrial technology) |
| GTC | Government Travel Card |
| GTC | Generalized Tonic-Clonic Seizures |
| GTC | Guanidinium Isothiocyanate |
| GTC | Good 'til Cancel (online marketing) |
| GTC | Great Canary Telescope (Tenerife, Canary Islands) |
| GTC | Green Tea Catechins |
| GTC | Gas Turbine Compressor |
| GTC | Gopher Tortoise Council |
| GTC | General Terms and Condition |
| GTC | Grains Trade Convention |
| GTC | Gain Time Control |
| GTC | Griffin Technical College (Griffin, Georgia, USA) |
| GTC | GPON Transmission Convergence (GPON = Gigabit Passive Optical Network) |
| GTC | Government Trading Corporation of Iran |
| GTC | Guards Tank Corps |
| GTC | Grand Turismo Concept (PS2 game) |
| GTC | Group Technologies Corporation |
| GTC | Ground Tactical Commander |
| GTC | Grand Tour Cluster |
| GTC | Georgian Trade Center (Tbilisi, Georgia) |
| GTC | General Trias, Cavite (Philippines) |
| GTC | General Tenders Committee |
| GTC | Gran Turismo Competizione (Ferrari) |
| GTC | Geologic Testing Consultants (Houston, TX) |
| GTC | Greenhouse Gas Technology Center |
| GTC | Gaelic Tugboat Company |
| GTC | Gas Turbine Change |
| GTC | Goulburn Teachers' College (Australia) |
| GTC | Grav-Tech Canada |
| GTC | Gradual Transition Coating |
| GTC | Graduate Technology Coordinator |
| GTC | General Therapeutic Class (healthcare code) |