Lac Gadiou is a Lake located in Lac-Legendre; Matawinie, Quebec and has an elevation of 483 meters.

• Latitude: 46° 38' 48'' North   (decimal: 46.6467105)
• Longitude: 74° 28' 52'' West   (decimal: -74.4810016)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 483 meters
• Location: Lac-Legendre; Matawinie
• Atlas of Canada Locator Map: Lac Gadiou
• GPS Coordinate Locator Map: Lac Gadiou Lat/Long