The NCAA standard for D1 student-athletes to be eligible is based on the school's individual minimum GPA for graduation and how many years of school the athlete has completed.
Thus, there is no minimum GPA for a freshman to play in the spring of his first year. A freshman who was a qualifier out of high school only has to meet the NCAA standard of completing 6 credit hours for the fall term to play in the spring.
For subsequent years, their cumulative GPA must be at least 90 percent of the institution’s minimum overall grade-point average necessary to graduate by the beginning of year two, 95 percent of the minimum graduation GPA by year three and 100 percent by year four. So if the school will let you graduate with a 2.0 GPA, you can play as a sophomore with a 1.8 GPA going into your sophomore year.
Academic progress rates don't kick in until the end of the second year.
It's possible the school or the conference may have stricter rules.