Alpha Xi chapter was founded May 3, 1950.  Re-Chartered April 2020.   

https://gammathetaupsilon.org/eligibility.html

Eligibility for Membership

Persons seeking membership must be initiated through an established chapter of Gamma Theta Upsilon. There are two classes of membership in GTU:

Regular Member: In keeping with the Society's Specialized Scholarship classification, initiates must have completed the equivalent of three semesters of college coursework, a minimum of three courses in geography with a 3.3 GPA (on the 4.0 scale) in those courses, and rank in the top 35% of their class (a 3.3 GPA can be used as a substitute for the ranking if the institution does not calculate rankings). Please note that regular members do not have to be currently enrolled, nor must they be geography majors.

{Valpo does not offer undergrad class rankings}

Honorary Member: Honorary membership is available only under extraordinary circumstances and upon approval by the Executive Committee for a person whom the committee feels has contributed to a marked advancement in any phase of geography. A chapter may apply directly to the Executive Committee to petition for honorary membership on behalf of an individual. Please note that honorary membership is reserved for those not eligible for regular membership.