My dream school is Stanford
Do the best to make your dream come true then. That means having a competitive score for GSB.
I agree that applying now is not a great idea, your chances are slim to none unless you have some very extraordinary circumstances and experience.
You're also below the GPA avg. While a 3.5 is great its just OK at GSB.
If it is your dream do whatever you can to make your candidacy viable.
Right now you'd probably be a straight DING w/o interview. No offense (I would be too) but if your way below in one stat and slightly below avg. in another its probably a no go.