As a fairly active alum from Ball State, I have never heard of Delta Gamma Iota as a recognized group. It also isn't anwhere on their webpage. My gut tells me this is a group of guys who just call themselves a "fraternity". Notice how the letters are switched around from GDI?
This also remindes me when I was in school, we had a brother, who for a class, had to collect roadkill. Unbeknownst to me, he was keeping it in the freezer at the house. Imagine my reaction when I opened the freezer door