I know I can't speak for other sororities, but my sorority requires that each prospective new member have at least a 2.0 GPA at initiation according to IHQ. After she is initiated she must remain in good standing with her chapter--and each chapter sets their own standards for GPA. When going through the selection process we do look at their GPA, but we also look at her other achievements. If you have any concerns, try talking to your rho chi about it.