GMAT scores are not the only criteria for getting a scholarship. Although, the GMAT score plays a vital role, apart from that the admission authorities also look into your previous academic performance, professional experience, achievements and how you put all these together in a strategic manner. If you are in a top business school, then getting scholarship can be very tough. So the selection of school also matters. If your profile appears to be better than the average class profile, your chances for scholarships also increase.