Surname Gio (Gio 
, ジオ 
, გიო 
) , worldwide, is a common last name. The surname Gio is habitual in Georgia, where it is quite a rare surname, Italy, and Trinidad and Tobago. Not in comparison with a country's population, it most frequently occurs in Indonesia, Philippines, and Italy. More prevalently, Gio is the forename as well as the last name.