Can we take GRE rather than GMAT for MBA Admissions for US Universities?

Hi all, I took gmat 2 months back and i'm pretty sure i cant make it even if i try it again, so planned to shift my exam track from gmat to gre as i could see many or all U.S Univ's consider gre score as well for MBA admissions. Could you please suggest me how could be this, if i take gre and apply for mba univ's? and what would be the chance of getting scholarship & univ's for a score of (310 - 314 ) & i expect univ ranked btw (40 - 50) in US.