The Italian outfit have signed the Turkish forward from the Super Lig champions.
Turkish Super Lig champions Galatasaray have sold their German-born forward Sinan Gumus to Genoa, both clubs confirmed on Friday.
The Serie A club announced on their official website that the 25-year-old has signed a multi-year contract with them.
Gumus, who played for Galatasaray since 2014, was released by Galatasaray upon the expiration of his deal and was a free agent.
During his five-year stint with The Lions, the German-born Turk won eight trophies including three Super Lig titles.
He leaves Galatasaray having made a total of 116 appearances during which he scored 33 goals.