| Abbreviation | Definition |
|---|---|
| GSS | Golden Standard System |
| GSSC | General Security Services Corporation |
| GSSC | General Studies Student Council |
| GSSLC | General Secretariat for Social Land Concessions |
| GST | General Systems Theory |
| GST | Goods and Services Tax |
| GSU | General Service Unit |
| GSW | General Steel Wares |
| GSW | General Studies Writing |
| GT | General Trade |
| GT | Group Talk |
| GTA | General Temporary Assistance |
| GTAAAP | Greater Toronto Area Agriculture Action Plan |
| GTC | General Terms and Conditions |
| GTCE | General Teaching Council for England |
| GTD | Guaranteed |
| GTIN | Global Trade Identification Number |
| GTIN | Global Trade Item Number |
| GTP | General Treatment Products |
| GTPL | General Third Party Liability |