Some of G.K.'s most recent credits include a guest star in POKER FACE, and LAW & ORDER: SVU, as well as a leading role in an indie called NEW ME. He also recurred in 5 episodes of Warren Leight's critically-acclaimed boxing series LIGHTS OUT for FX.
Other guest credits include BLUE BLOODS, GOSSIP GIRL, WHITE COLLAR, THE FOLLOWING, and STATE OF AFFAIRS..
In film, he had a supporting role in RUN ALL NIGHT opposite Liam Neeson and Ed Harris, and he played the villain Benito Ramirez opposite Katherine Heigl and John Leguizamo in ONE FOR THE MONEY.
GK started out as front-man for the hip-hop band Natural Selection and was a Golden Gloves boxer.