There is no such criteria or restrictions tightly for GMAT score. The foreign universities take a lot many aspects of your career and life into account rather than just GMAT score. Your GMAT score is more of a neccessary condition but not a sufficient one. Nowadays some colleges even take GRE score into consideration. So it is just a test of standard aptitude and reasoning rather than being something which requires great scores. So stop worrying about your score in GMAT. Rather work on your profile and other aspects.
Good luck!