We have a minimum incoming GPA requirement, which is set at the international level. I think this is pretty typical, but the minimum can vary from group to group. The Alabama recruitment guide lists "suggested" GPAs (these may be the international minimum, or they may be a locally set higher minimum). While chapters may have some leeway with locally set higher GPA minimums, chapters cannot extend a bid to you if you do not meet the group's (inter)national minimum. Last year's guide indicates that every group has at least a 3.0 listed, and some are higher. Take these seriously...they are listed to give PNMs guidance in situations like yours.
http://www.uapanhellenic.com/greek-chic.html
You don't want to shoot yourself in the foot by getting released during freshman recruitment due to sub-minimum HS grades...then earning a great GPA and getting involved freshman year, only to have a potentially successful sophomore recruitment derailed because chapters remember you had a low GPA when you went through the previous year. Better to have a fresh start and go in strong sophomore year, in my opinion.
