Family name Гагас (Gagas 
, Гагас 
) , in all the world, is quite a rare last name. The family name Гагас is characteristic of Lithuania, where it is quite a rare surname, Greece, where it is a rare surname, and Indonesia. Not in comparison with a country's population, the name is most common in Indonesia, the United States, and Lithuania. More prevalently, Гагас is the forename as well as the last name.