The GPA is very important in our decision-making process, says Robert Bennett, senior associate director of admissions at Clemson, where the average high school GPAs for new freshman catapulted from 3.59 to 4.10 over five years.The range on math scores remained the same, 580-680 out of a possible 800.arents and their high school students are fascinated by the grade point average and what it means in college admissions, but the truth is that a number of colleges and universities are not all that interested.