I was on Panhellenic in '07, and we tried to propose raising the minimum GPA for recruitment at my alma mater. Two groups would simply not hear of it. Even though they had higher standards, they wanted to opportunity to meet the women and choose at their own discretion if they would allow for grade exceptions. We all thought it was ridiculous because typically most chapter don't or only have a few and so these women were set up to fail, but we quickly dropped the issue because they had the right to take whomever they wanted. If they wanted to look at women with bad gpas, more "power" to them.
The GPA requirements remain the same today.