The reason I asked about gpa is my daughter recieved 4 bids from second rounds, she has a 3.5 gpa. Of the four houses, 3 are at the top in regards to grades. I tend to think that her gpa may have helped her in getting asked back.
It must depend on the school. The statistics for Florida on their admissions page state that the average GPA for the freshman class (on the class profile) is OVER a 4.0. Hopefully that is because it is adjusted for honors and AP classses (and IB classes if available in the school). But I can't imagine that any of the young women getting admitted would be considered a grade risk if they have that GPA.