The name Gable means God Is Bright and is of German origin. Gable is name that's been used by parents who are considering unisex or non-gendered baby names--baby names that can be used for any gender.
Most likely a derivative of the German name Goebel/Göbel which means "God" and "bright." Could also be German/Jewish (Ashkenazic) occupational name for a maker and seller of forks, from the German Gabel, meaning "fork."