| Acronym | Definition |
|---|
| GSsA | Groupe pour une Suisse sans Armée (Switzerland) |
| GSsA | Geological Society of South Africa |
| GSsA | Georgia School Superintendents Association |
| GSsA | Gay-Straight Student Alliance |
| GSsA | Georgia State Soccer Association |
| GSsA | Grassland Society of Southern Africa |
| GSsA | Generic Security Service Algorithm |
| GSsA | Georgia Sport Shooting Association |
| GSsA | Genealogical Society of South Africa |
| GSsA | General Supply Support Area (US DoD) |
| GSsA | Georgia Youth Soccer Association |
| GSsA | Golden State Spirit Association |
| GSsA | Grapevine-Southlake Soccer Association |
| GSsA | Garden State Seafood Association |
| GSsA | Garden State Sighthound Association |
| GSsA | Global Standard Stratigraphic Age |
| GSsA | Gay Sport South Africa |
| GSsA | Generalized State Space Averaging |
| GSsA | Greater Sacramento Softball Association (California) |
| GSsA | General Sales and Service Agents |
| GSsA | Guernsey Social Security Authority |
| GSsA | Graduate Student Service Appointments |
| GSsA | Greater Sycamore Soccer Association |
| GSsA | Granite State Swimming Association |
| GSsA | gated static single assignment |
| GSsA | Greedy Single Switch Algorithm |
| GSsA | Graduate Student Sociology Association |
| GSsA | Gold Skull of St. Andrew (award) |
| GSsA | Georgia Science Supervisors Association |
| GSsA | Gauteng Schools Sports Association |
| GSsA | Georgia Self Storage Association |
| GSsA | Garden State Sikh Association, Inc. |
| GSsA | General Support Supply Activity |
| GSsA | Guaranteed Share Scanner Algorithm |
| GSsA | General Sunday School Association (Universalist Church) |
| GSsA | Global Security and Stability Agency |
| GSsA | Guild for the Study of Spatial Anomalies |
| GSsA | Graduate Students Study Abroad |
| GSsA | gross specific surface area(s) |
| GSsA | Greater Sacramento Staging Association (California) |
| GSsA | Global Singers and Songwriters Association |