Gneiss Island is a Island located in Ontario.

• Latitude: 49° 31' North   (decimal: 49.5167000)
• Longitude: 88° 55' West   (decimal: -88.9167000)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• GPS Coordinate Locator Map: Gneiss Island Lat/Long