Born in 1990, he was a solo artist before joining Beast in 2010. No exciting scandals other than fans being annoyed that his nickname (AJ) is the same as Paran’s AJ. Boring. He’s young though… hopefully he’ll do something crazy soon.
A google image search for Gi-kwang suggests looking at his abs and bodies. How does google know me so well?
He does have pretty great abs.
As for homoeroticism, the best I can find is this: