southernstunna,
just imagine this:
You: -Hi Kattie, how are you?
Kattie: - Hi, I am fine, how about you?
You: - I am fine . I have recently passed the GMAT and received 720!
Kattie: - Really, so what? What is the GMAT?
you:- omgh... ?!

Well GMAT is bla bl bla.. and maximum score is 800.
Kattie: - oh really? I have not heard about the GMAT. is it so good/cool to receive 720 out of 800? (She thinks at this moment "Hmm... this guy might be not so smart if he did not get 800".
Funny?
I think that most of pretty girls don't care / don't know about the GMAT.
I my region one may have a gmat of 210 and possess a luxury car like Porsche Cayenne.
Believe me he will be more attrractive to girls than one who gets 800 on the GMAT.
But look, nothing offensive. There may be a case that once you can impress a girl who struggles with the GMAT for two years and has less than 600.