If the score is below 60, it will be 0; if the score is above 60, the score will increase by 10, with a maximum of 5 points. The calculation formula of GPA is: GPA = (course grade -50)/ 10. If the course score is below 60, the GPA is 0. GPA refers to the sum of the product of GPA and all course credits divided by the sum of all course credits.