| Abbreviation | Definition |
|---|---|
| GHOS | Greater Horn Oncology Symposium |
| GHRO | Greater Houston Radiation Oncology |
| GI | Gastro-Intestinal |
| GIST | Gastro-Intestinal Stromal Tumor |
| GIST | Gastrointestinal Stromal Tumours |
| GMC | General Medical Council |
| GM-CSF | Granulocyte Macrophage Colony- Stimulating Factor |
| GOC | Gynecologic Oncology of Canada |
| GOG | Gynecologic Oncology Group |
| GP | Gradual Progression |
| GPOH | Gesellschaft fur Padiatrische Onkologie und Hamatologie (German Pediaatric Oncology Group) |
| GPR | Good Partial Remission |
| gRED | Genentech Research and Early Development |
| GSHO | German Society Of Hematology And Oncology |
| GSOS | Global Surgical Oncology Summit |
| GU | Genito Urinary |
| GVHD | Graft Versus Host Disease |
| GY | Grays (units of radiation) |
| H&E | Hematoxylin and Eosin (stain) |
| HAART | Highly Active Anti Retroviral Treatment |