| GSA | Group-specific antigen |
|---|---|
| GSA | Guanidino succinic acid |
| GSA-II | Griffonia simplicifolia agglutinin II |
| Gsb | Gooseberry |
| GSC | Goosecoid |
| GSD | Geometric Standard Deviation |
| GSD | Glycogen Storage Disease |
| GSD | gestodene |
| GSD 1a | Glycogen storage disease type 1a |
| GSD I | Glycogen storage diseases type I |