The GPA scale is from 0.0 to 4.0, with 4.0 being the highest. So, if you were a 'straight A' student, your GPA would be 4.0 – if you were all 'B's' across the board, your GPA would be 3.0, and so on. Here's a guide to go by: A (7, 8 , 9 in GCSE) = 4.0. B (5, 6 in GCSE) = 3.0.