Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Gyăros, i, and Gyăra, ae, f., and Gyăra, ōrum, n., = Γύαρος, Γύαρα, a small barren island in the Ægean Sea, one of the Cyclades, used by the Romans under the empire as a place of exile for criminals, now Chiura, Cic. Att. 5, 12, 1 sq.; Varr. ap. Plin. 8, 29, 43, § 104; Verg. A. 3, 76; Tac. A. 3, 68 sq.; 4, 30; Juv. 10, 170; 1, 73; Plin. 4, 12, 23, § 69; 8, 57, 82, § 222.
Gyas or Gyes, ae, m., = Γύης.