Hi Ap3ir0n,
Many Schools do accept either the GMAT or GRE as part of the application process, but you should take the time to confirm that all of the Schools that YOU are interested in actually accept the GRE. Assuming that they all do, you should take advantage and submit whichever Score presents you in the best light. The GRE does place a much greater emphasis on a Test Taker's vocabulary knowledge (including when to use certain words instead of others), so you should review your recent practice GRE to better define WHY you got questions wrong in the Verbal section. For example, how many incorrect answers came down to the fact that you didn't have the needed vocabulary knowledge and how many were because of some other reason? Depending on how quickly you can hone the necessary GRE Verbal skills, you could potentially take the GRE relatively soon (potentially in just a couple of weeks) and hit that Score Goal.
GMAT assassins aren't born, they're made,
Rich