DemographicsGnotuk is approximately 19.58 square kilometres. In 2016 the population of Gnotuk was 99. The population is 51% male and 49% female. On average the monthly mortgage repayments in Gnotuk are $1000 to $1399. The most common weekly income bracket is $1000 to $1249 per week. Weekly rents in the area are on average $150 to $199.