I had 3.0 gpa and 99.9% SAT, and I also got slightly less than 3.0 gpa in college. Therefore, I am pretty sure GPA in high school is a better predictor of academic success in college. Lol. To this day, I can only study when there is more than grade on the line. Note if my parents were paying a lot of money for my education, I probably would have studied a little bit harder, but I went to college and post College for basically free, so I felt I could read the books I wanted to read and work to gain practical experience rather than study a lot.