| Abbreviation | Definition |
|---|---|
| GBC | Gallbladder carcinoma |
| GBCN | Global Breast Cancer Network |
| GBCT | Global Biotechnology Cancer Therapeutics |
| GCCI | Global Cancer Concern India |
| GCRF | GIST Cancer Research Fund |
| GCRI | Gujarat Cancer Research Institute |
| GCSQ | Gynaecological Cancer Society of Queensland |
| GFC | Golf Fights Cancer |
| GFCC | Garron Family Cancer Centre |
| GFOBT | Guaiac Fecal Occult Blood Test |
| GGCC | Golden Gate Cancer Center |
| GICI | Gastro Intestinal Cancer Institute |
| GICI | Genome Integrity and Cancer Initiative |
| GICR | Global Initiative for Cancer Registries |
| GICR | Global Initiative for Cancer Registry |
| GIRC | Grenoble Institute of Research on Cancer |
| GLCC | Global Lung Cancer Coalition |
| GNCF | Greater Nottingham Cancer Forum |
| GOCA | Georgia Ovarian Cancer Alliance |
| GPCC | Georgia Prostate Cancer Coalition |