Gairo, Gàiru in Sardinian, is a comune in the Province of Nuoro in the Italian region Sardinia, located about 80 kilometres northeast of Cagliā¦Gairo, Gàiru in Sardinian, is a comune in the Province of Nuoro in the Italian region Sardinia, located about 80 kilometres northeast of Cagliari and about 30 kilometres southwest of Tortolì. As of 31 December 2004, it had a population of 1,643 and an area of 78.4 square kilometres.