Sigma Nu exists to cultivate and develop ethical leaders. An education is the most important part of that formula. You are a student first, and a Sigma Nu second. To ensure this is happening, Sigma Nu, in accordance with the North-American Interfraternity Conference (the governing arm of 65 national fraternities), has a minimum standard that all members must maintain at least a 2.25 individual GPA and a collective chapter GPA of 2.5.