Gerdekhisar is a village in Kelkit District, in Gümüşhane Province, Türkiye. Gerdekhisar lies at 1,458 m above sea level, in the Otlukbeli Dağları mountains. It has 581 inhabitants. The nearest city is Kelkit, 8.6 km to the east. Among the landmarks around are Satala (23 km).
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