| Code | Name | Region |
|---|---|---|
| GBHDI | Hadleigh | ESS |
| GBHDL | Hadleigh | SFK |
| GBHDY | Hadley | TFW |
| GBHAW | Hadley Wood | |
| GBDLW | Hadlow | KEN |
| GBGH9 | Hagley | WOR |
| GBGMY | Grimsay | ELS |
| GBGSY | Grimsby | NEL |
| GBGIM | Grimston | NFK |
| GBGDL | Grindale | ERY |
| GBGRP | Gristhorpe | NYK |
| GBGRO | Groomsport | NDN |
| GBGRW | Grove Port | NTT |
| GBGRJ | Grovehurst Jetty/sittingbourne | KEN |
| GBGRU | Grutness | ZET |
| GBGDB | Guardbridge | FIF |
| GBGPO | Guide Post | NBL |
| GBGDD | Guildford | SRY |
| GBGSB | Guisborough | RCC |
| GBGUI | Guiseley | LDS |
| GBZBF | Gullane | ELN |
| GBGVL | Gulval | CON |
| GBGUN | Gunn | DEV |
| GBGUS | Gunness | NLN |
| GBGUW | Gunness Wharf | NLN |
| GBGUM | Gunnislake | CON |
| GBGCX | Greencroft | DUR |
| GBGFD | Greenfield | BDF |
| GBGFI | Greenfield | FLN |
| GBGFR | Greenford | EAL |
| GBGHI | Greenhithe | KEN |
| GBGEE | Greenlaw | SCB |
| GBGMU | Greenmount | BUR |
| GBGRK | Greenock | IVC |
| GBGNW | Greenwich | LEW |
| GBZBE | Greetham | RUT |
| GBGTL | Greetland | CLD |
| GBGDO | Grendon | WAR |
| GBGNS | Grenoside | SHF |
| GBGRT | Gretna | DGY |
| GBXGG | Gretna Green | DGY |
| GBXGE | Gretton | GLS |
| GBNO2 | Gretton | NTH |
| GBGPE | Grimesthorpe | SHF |
| GBXGY | Grimley | WOR |
| GBGRI | Grimsargh | LAN |
| GBGRM | Great Missenden | BKM |
| GBGEN | Great Notley | ESS |
| GBGOA | Great Oakley | ESS |
| GBGRR | Great Ryburgh | NFK |