There are a few options in the area.
The Flossmoor Station suggestion was good.
The Tinley Park Italian places aren't that far away such as Gatto's and Isabella Cafe, and are enjoyable.
There is also a small Afro-Caribbean restaurant called Mabovi, that I have been enjoying recently. The owner, Bea, is very friendly and is originally from Ghana. I have tried the Jerk Chicken, curried oxtails, lamb shank, the snapper, and the tilapia there, and all have been very good. It is only about 10 minutes or so from GSU, and I would highly recommend it.
Mabovi Restaurant
4455 West Lincoln Highway (rt. 30)
Matteson, IL 60443
708-747-7315
www.mabovirestaurant.com