| Acronym | Definition |
|---|
| GTCS | General Teaching Council for Scotland (UK) |
| GTCS | Generalized Tonic-Clonic Seizure |
| GTCS | Global Technologies & Consultancy Services (various locations) |
| GTCS | Ganesh Technical Consultancy Services (India) |
| GTCS | Graduate Training Consultant Program (University of Michigan) |
| GTCS | Georgia Tech Computer Store |
| GTCS | Georgia Tech Consulting Services (Georgia Tech University) |
| GTCS | Ground Tactical Communications Services |
| GTCS | Gas Turbine Control System |
| GTCS | Global Technologies and Control Solutions (Sintra, Portugal) |