Hi...please give me some advise..

I plan to take MBA program at New york, and I tried to take GMAT, and I really shock when I saw my GMAT score.
should I take the GMAT preparation and retake the GMAT before I take the MBA program or Could I take the pre-MBA program, and do not take the GMAT preparation??
and how about pre-MBA that Manhattan institute of management offered??
and anybody could inform me about international MBA program at Manhattan Institute of management??

thank you