GMU has 3 National Panhellenic Conference Sororities listed on its Greek Life page. I am not sure if there are more so someone please jump in if I'm mistaken. The ones listed are:
Alpha Omicron Pi
Alpha Xi Delta
Zeta Tau Alpha
Here is the link for GMU's Greek Life page:
http://www.gmu.edu/student/soap/html...life_page.html
I also found the individual chapter links which are not accessible from their Greek Life page:
AOII's chapter at GMU:
http://www.gmu.edu/org/aopi/
AXiD's GMU Chapter:
http://www.gmu.edu/org/alphaxidelta/
GMU's ZTA chapter:
http://www.gmuzta.org/
They all look like great chapters! All of these sororities are wonderful organizations and are strong nationally as everyone here will tell you. My advice would be to keep an open heart and mind going through recruitment because what someone else thinks is "best" may not be "best" for you. Also generally speaking, I do not believe that hazing is tolerated by the national organizations of these sororities or by most universities in this day and age. I cannot speak personally for GMU, but I know that to be true based on my own experiences as a sorority member and the experiences of my other friends at other college campuses.
This is a great place to ask questions and get advice! Have a great time going through recruitment and let us know how it goes.