| Country | France (FR) |
| UN/LOCODE | GCH |
| Name | Guichen |
| Name Without Diacritics | Guichen |
| Region | 35 |
| Function Code | 1------- |
| Function | Port |
| Status Code | RL (Recognised Location) |
| Date | 601 |
| Timezone | Europe/Paris |
| Location (UN Format) | 4758N 00147W |
| Latitude Longitude | 47.9681, -1.7958 |