| Country | France (FR) |
| UN/LOCODE | GMS |
| Name | Gujan-Mestras |
| Name Without Diacritics | Gujan-Mestras |
| Region | 33 |
| Function Code | 123----- |
| Function | Port, Rail, Road |
| Status Code | RL (Recognised Location) |
| Date | 601 |
| Timezone | Europe/Paris |
| Location (UN Format) | 4438N 00104W |
| Latitude Longitude | 44.636, -1.0681 |