It completely depends on the sorority or fraternity, the college, the year, the adult leadership. My son’s fraternity was not known nationwide for high GPAs but from when he took over the fraternity as a whole (large fraternity with 70 living in the house) went to a 3.5+ GPA. There were many engineers, pre-meds, pre-vets, etc. in the house. My son had to go go conferences, work with the dean, work with the alumni advisor (the CEO of a major corporation), etc. Were there a few who just didn’t care, sure. Did he have his tribe - yes. His chapter even got best chapter nationwide. His fiancee was in the same type situation at her sorority.
There were some fraternities and sororities neither would have even though of joining because of their academic goals. My son even said there were some chapters of his own fraternity he would never join (a few of those were SEC chapters).