| Abbreviation | Definition |
|---|---|
| GSD | General Services Department |
| GSD | Ground Systems Division |
| GSD | Gypsum Specialty Dealer |
| GSDIC | Great Saudi Development & Investment Co. |
| GSE | Golden Systems Electronics |
| GSEC | Granite State Electric Company |
| GSEC | Gujarat State Export Corporation |
| GSEI | Gairns Santos Engineering Inc |
| GSEI | Group Structural Engineers Inc |
| GSEL | Ground Support Engineering Ltd |
| GSFC | Gujarat State Fertilisers Corporation |
| GSG | German Sport Guns GmbH |
| GSGI | Global Studies Group Inc |
| GSGS | Geoff Swinfield Genealogical Services |
| GSI | Gallegos Sanitation Inc |
| GSI | Geodetic Services Inc |
| GSI | Geodetic Services Incorporated |
| GSI | Geodetic Systems Inc |
| GSI | Gerontological Services Inc |
| GSI | Gordon and Schwenkmeyer Inc |