Gürsökü is a village in Ayancık District, in Sinop Province, Türkiye. Gürsökü lies at 591 m above sea level, in the Küre mountains. It has 507 inhabitants. The nearest city is Boyabat, 39 km to the south. Beaches nearby: Harzana (14 km), Ali Köyü (15 km). Among the landmarks around are Erfelek Dam (8.5 km). Among the natural features are Tatlıca Waterfalls (6.6 km).