| GACP | Gravity Assisted Concrete Poisoning - Jumped / Fell From Height | - | NASA |
| GDA | Gonna Die Anyway | - | NASA |
| GLF | Ground Level Fall (tripped Over) | - | NASA |
| GLM | Good Looking Mum | - | NASA |
| GOA | Gone On Arrival (police Turn Up, Ambulance Turns Up, Fire Brigade Turns Up, Patient Doesn't) | - | NASA |
| GOK | God Only Knows | - | NASA |
| GOL | Gone Off Legs (see FOL) | - | NASA |
| GOLP | Generalised Old Lady Pains | - | NASA |
| GOMER | Get Out Of My Emergency Room; Extended To Mean Elderly Patient Who Is Unable To Communicate Their Symptoms And Passed From One Department To Another | - | NASA |
| GORK | God Only Really Knows | - | NASA |
| GPH | Goddamns Per Hour | - | NASA |
| GPO | Good For Parts Only (won't Survive) | - | NASA |
| GRAFOB | Grim Reaper At Foot Of Bed | - | NASA |
| GRAHOB | Grim Reaper At Head Of Bed | - | NASA |
| GROLIES | (UK) Guardian Reader Of Low Intellect In Ethnic Skirt | - | NASA |
| GSP | Gown Sign Positive - A Patient Who Leaves (self-discharge) Without Official Discharge Orders | - | NASA |
| GTG | Go To Ground - Fall Out Of Bed Or Chair | - | NASA |
| GTMJACB | Gone To Meet Jesus, Ain't Coming Back (dead) | - | NASA |
| GTO | Gomer Tip Over (elderly Person With Injury From Trip Or Fall) | - | NASA |
| GTTL | Gone To The Light (died) | - | NASA |
| GUCCI | Genito-Urinary Clinc, Chlamydial Infection (posh Female With Sexually Transmitted Chlamydial Infection) | - | NASA |
| GWR | God's Waiting Room; Intensive Care Unit And/or Geriatric Unit | - | NASA |
