GCA (giant cell arteritis)

GCP (good clinical practice)

GCS (Glasgow Coma Scale)

GCT (gastrointestinal carcinoid tumor)

GD (gestational diabetes)

GDM (gestational diabetes mellitus)

GDP (guanosine diphosphate)

GDS (geriatric depression scale)

GE (gastroenterology)

GEA/GETA (general endotracheal anesthesia)