I'm going in with 10th Illinois as part of 1st Illinois Battalion merged with Black Hat Battalion to portray 2nd Wisconsin, Iron Brigade. At GAC of course
Also from GAC's facebook page. last updated March 24. About 8,889 reenactors have registered.
Also Duuring ,
GAC is Gettysburg Annual Committee, these guys host Gburg every year. (Considered as little bit farby due to their effort to Historical accuracte compared to BGA. But they have low standards than BGA) and BGA is Blue Grey Alliance, they host various 150th battles across the Mid-west and East. So GAC = Gettysburg Only, and BGA = all Battles. (BGA has high standard expectations but a con, sometime their logistic fails. I've heard some reenactors didnt get water provided included the horses
.)