(adj) beautiful; very attractive. It is a shortened form of saying outstandingly gorgeous that is often used to comment on instagram or facebook photos. It is the highest form of flattery. Originating in the suburbs of Philadelphia, the word "ga" is a hip, new word.
Related forms: "gallium," which is an element on the periodic table that has the chemical symbol of "Ga." Gallium also can be used to mean gorgeous.
Ga is a Kwa language spoken in Ghana, largely among people of the southeast coast; in and around the capital Accra. It has a phonemicdistinction between 3 vowel lengths.