Surname גאס (Gus 
, Gass 
, גאס 
) , in all the world, is a common cognomen. The family name גאס is habitual in Switzerland, where it is quite a rare surname, Tunisia, and Austria. Not in comparison with a country's population, it is the most numerous in the United States, Indonesia, and Germany. More frequently, גאס is the forename as well as the last name.