Gavgol-e OlyaGavgol-e Olya is a village in, and the capital of, Gamasiyab Rural District of the Central District of Sahneh County, Kermanshah province, Iran.DemographicsPopulationAt the time of the 2006 National Census, the village's population was 505 in 117 households. The following census in 2011 counted 461 people in 135 households. The 2016 census measured the population of the village as 359 people in 99 households.