Gudgum is a village in the Zangezur uezd of the former Yelizavetpol (Ganja) governorate, later in the former Gafan district, in the present territory of the Syunik province. The provincial centre is located 4 km to the south of the town of Gapan, at a height of 900 m above sea level. Following the establishment of Zangezur uezd in Soviet Armenia on 31 August 1921, the settlement was integrated into the administrative area of Armenia.

The village was initially inhabited by Azerbaijanis, and following the settlement of Armenians in the district, its inhabitants gradually left the village. In 1897, along with the Armenians, the village was inhabited by 19 Azerbaijanis. At the beginning of the 20th century, in 1905–1906, the Azerbaijanis were expelled from the village.

By the decree of the Presidium of the Supreme Soviet of the Armenian SSR dated 29 June 1949, the village was renamed “Geghanush”. According to the law “On the administrative-territorial division of the Republic of Armenia” dated 7 November 1995, it was integrated into the administrative area of the Syunik province.

Geographical coordinates: latitude: 43°10’ N, longitude: 46°25’E.