In recent years, the average GMAT score worldwide is 570. There is no “acceptable” or “minimum” score. What score you should obtain depends on which school you are going to apply to. Generally, the higher the school ranks, the higher score you must obtain. For the top 50 programs, the averaged GMAT score is 660. During the test, you can quit the test at any time. When you quit, no score for any test section will be tabulated or recorded by the testing service, or reported to any school.