It’s a matter of context. HSs have so much variation in grading and different weighting systems that a 3.3 without knowing anything about the HS is not meaningful. However, I’m assuming you are talking about colleges. Different colleges have different degrees of grade inflation/deflation and various other relevant factors to GPA, but it also depends on what you are planning to do after college. For example, if a GPA cutoff is used for resume evaluation, it’s most likely to be 3.0. 3.3 and 3.9x both meet the cutoff, and after meeting the cutoff, hiring decisions generally focus on other criteria, such as experience/internships. However, if you plan on applying to medical school, the difference between a a 3.3 and 3.9x GPA becomes far more important.