Gav Koshak (, also Romanized as GÃÂv Koshak; also known as GÃÂv Koshak-e 'OlyÃÂ and GÃÂv Kushak) is a village in Dasht-e Barm Rural District, Kuhmareh District, Kazerun County, Fars province, Iran. At the 2006 census, its population was 580, in 151 families.