- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 51°38'8"N 3°47'9"W
- Eastings/Northings: 276500, 194500
- OS Grid: SS765945
- Mapcode Local: GBR H3.84G2
- Mapcode Global: VH5GV.B4DW
Location and coordinates are for the approximate centre of Gelli-gaer within this administrative area.
Geographic features and populated places may cross administrative borders.