To assist the OP:
Since the OP has access to the stats of her/his school, she/he can also get access to the university criteria for active status for all GLOs.
Also, numerous colleges and universities provide grade info to the councils and also place them on websites.
U of Md is one such school: http://www.greek.umd.edu/Grades.htm
They have a PDF link with the chapter breakdowns. 
They discuss an emphasis on academics and codes of conduct on another link. Maybe they provide details on the site about how members and chapters can get on probation or suspension with the university.
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