| Code | Name | Region |
|---|---|---|
| GBGLN | Glanton | NBL |
| GBGLW | Glasgow | GLG |
| GBGLK | Glasshoughton | WKF |
| GBGLD | Glasson Dock | LAN |
| GBGRY | Glastonbury | SOM |
| GBGZB | Glazebury | WRT |
| GBGTN | Garston | LIV |
| GBGTC | Gartcosh | NLK |
| GBGHA | Garth | BGE |
| GBGMR | Gartmore | STG |
| GBDBK | Garvagh | |
| GBGRV | Garvald | ELN |
| GBGAV | Garve | HLD |
| GBGST | Gastard | WIL |
| GBGHF | Gatehouse Of Fleet | DGY |
| GBGAT | Gateshead | GAT |
| GBLGW | Gatwick Apt/london | WSX |
| GBGAY | Gaydon | WAR |
| GBGDT | Geddington | NTH |
| GBGDK | Gedney Dyke | LIN |
| GBGE2 | Gelli | PEM |
| GBGGR | Gelligaer | CAY |
| GBBHD | George Best Belfast City Apt/belfast | BFS |
| GBDBL | Georgetown | RFW |
| GBGRC | Gerrards Cross | BKM |
| GBGDP | Gidea Park | HAV |
| GBGAW | Gaerwen | GWN |
| GBGAI | Gainsborough | LIN |
| GBGAR | Gairloch | HLD |
| GBGAH | Galashiels | SCB |
| GBDBJ | Galgate | LAN |
| GBGAS | Galmisdale, Eigg | HLD |
| GBGLT | Galston | EAY |
| GBGSN | Galston | EAY |
| GBGAG | Gamlingay | CAM |
| GBGMT | Gamston | NTT |
| GBGDN | Gardenstown | ABD |
| GBGLH | Gareloch | AGB |
| GBGAD | Garelochhead | |
| GBGRF | Garforth | LDS |
| GBGGV | Gargrave | NYK |
| GBGIS | Garlieston | DGY |
| GBRRB | Garrabost | ELS |
| GBGGI | Garrigill | CMA |
| GBGTA | Garstang | LAN |
| GBCSN | Garston | |
| GBFRI | Frinton-on-sea | ESS |
| GBFKH | Friockheim | ANS |
| GBFOW | Frisby On The Wreake | LEC |
| GBFSY | Friskney | LIN |