| Abbreviation | Definition |
|---|---|
| GCI | Grey Communications International |
| GCIC | Global Crop Improvement Company |
| GCIS | Government Corporation Information Sheet |
| GCL | General Corporation Law |
| GCL | General Counsel Ltd |
| GCMC | Ghana Cylinder Manufacturing Company |
| GCME | Greater China Media and Entertainment Corp |
| GCMI | Gold Coast Medical Imaging |
| GCMS | Global Communications Media Service, Inc. |
| GCN | Genesis Communication Network, Inc. |
| GCNA | Guarantee Company of North America |
| GCPI | General Company for Ports of Iraq |
| GCRG | Geneseo Community Radio Group, Inc. |
| GCRT | Gumokz Corporation Rapid Transit |
| GCS | Georgetown Cleaning Services |
| GCS | Global Communications Solutions |
| GCS | Global CyberSoft |
| GCSC | Gary Community School Corporation |
| GCSC | Gladwin County Sports Complex, Gladwin, Michigan |
| GCSC | Greencastle Community School Corporation |