| Abbreviation | Definition |
|---|---|
| GRDB | Gastroenterology and Renal Devices Branch |
| GRDB(CDRH) | Gastroenterology and Renal Devices Branch (CDRH) |
| GRN | Generally Recognized as Safe Notification |
| GRNs | Generally Recognized as Safe Notifications |
| GRP | Good Review Practice |
| GRS | General Records Schedule |
| GSDB(CDRH) | General Surgery Devices Branch (CDRH) |
| GSFA | General Standard for Food Additives |
| GSP | Good Statistics Practice |
| GT | Gutta (drops) |
| GTB(CBER) | Gene Therapies Branch (CBER) |
| GTIB(CBER) | Gene Transfer and Immunogenicity Branch (CBER) |
| GTIS | Gene Therapy Information System |
| GTL(NCTR) | Genetic Toxicology Laboratory (NCTR) |
| GTT | glucose tolerance test |
| GU | genitourinary |
| GWQAP | Government Wide Quality Assurance Program |
| GWQAP | Government-Wide Quality Assurance Program |
| GxP | Good "x" Practices (x = any type of practice) |
| GXT | Graded eXercise Tolerance |