grades

honestly ChiO and Theta are huge on grades. you won't have TGs the weeks of midterms, or the week prior to finals, and you won't see these girls at any of the fraternity formals those weeks either.

Then I'd say TriDelt and Kappa. Kappa wants to keep a really good image so that their alums donate money to them and TriDelt was starting to go down with grades so now theyre really working at it.

AChi is strict with their grades (kicks girls out) but they don't normally go for the really smart girls during recruitment like ChiO and Theta, and they don't work on their grades like TriDelt and Kappa.

Kappa was easily the most lenient on grades out of all of the "top" chapters. It may be different once you're in, but if you're below a 3.2 and aiming for a popular chapter, they're your best bet. Honestly, likely you're only bet unless you know members already or somehow really impress. But I guess it's possible that that's changed.

I know it sucks, but especially in that first round of cuts, grades really matter. Sororities just don't have too much else to go on at that point.

Some chapters can't suspend you on grades once you are initiated, as stated above. In fact, I don't know any chapter that can kick you out for low grades once you are initiated.
I think it would be a lie to say that there are any chapters who don't care what your grades are. Even chapters who traditionally are at the bottom of the scholarship rankings prefer members with good grades. Even after the chapters discuss you and vote, grades are calculated into rankings and low grades could put you lower on their bid list.

Theta, ChiO, and AGD have the best GPAs so they will care the most about your grades