GCTS
| Acronym | Definition |
|---|---|
| GCTS | Gordon-Conwell Theological Seminary |
| GCTS | Génie Civil Travaux Spéciaux (French: Special Civil Engineering Works) |
| GCTS | Ground Combat Training Squadron |
| GCTS | Geospatial Coordinate Transformation Services |
| GCTS | Gear Cutting Technology Systems, Inc. (Switzerland) |