| GSMS | General Support Missile System
| Others |
| GSMS | Generation Supply Management System
| Others |
| GSMS | Glade Spring Middle School
| Others |
| GSMS | Glenwood Springs Middle School
| Others |
| GSMS | Global Service Management System
| Others |
| GSMS | Global Smart Messaging Suite
| Others |
| GSMS | Good Shepherd Montessori School
| Others |
| GSMS | Graduate School of Medical Sciences
| Others |
| GSMS | Graduate Studies Management System
| Others |
| GSMS | Grand Saline Middle School
| Others |
| GSMS | Gray Station Middle School
| Others |
| GSMS | Great Smoky Mountains Study
| Others |
| GSMS | Great Southern Media Services
| Others |
| GSMS | Greensburg Salem Middle School
| Others |
| GSMS | Gulf Shores Middle School
| Others |