G.L.O. = Greek Letter Organization
I don't think you'll find ANY fraternity that condones or supports hazing. This is not part of the ideals and landmarks of the organization. It is a tradition that developed over recent years as a way to entertain current members and test the limits of pledges. Hazing links that I know of are the following:
http://www.stophazing.org/ http://www.hazinglaw.com/
Some films links about hazing:
http://www.frat-movie.com/ http://www.followers.com/
Hope that helps.
AXPAlum