- Category: Water Feature
- Type: Island
- Latitude/Longitude: 60°14'20"N 1°41'31"W
- Eastings/Northings: 417156, 1150560
- OS Grid: HU171505
- Mapcode Local: GBR Q15P.3GJ
- Mapcode Global: XHBVV.BXX0
Location and coordinates are for the approximate centre of Gro Stack within this administrative area.
Geographic features and populated places may cross administrative borders.