Gorgeous, Amazing and Sexy.
A word to describe that person in your life that you just cant seem to live without, and you dont know how you lived before them. Best Friend, relative, lover or that person you see across the street
Person 2: Yeah! She's G.A.S!
Can also be used as a greeting when meeting other self proclaimed GA's.
That party was such a sausage fest. it was so GA.
Alex is a GA. He had to sleep in his car because he left his keys at the whore house.
Alex and Rahul calling each other on the phone: "GA, GA"