| 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) |