The GPA is your score in the exam. There are five GPAs in the perfect score book. For example, 80 is 3 GPA, 86 is 3.6 GPA, and 90 is 4 GPA. But if you fail in the exam, you won't get a grade point, and you won't get a grade point if you take the exam later, but you will get credit, and the grade point won't affect the credit.