T7 GSC Injector
A Black Ops 3 1.33 prx .gscc injector plugin for GoldHEN working on any jailbreakable firmware

Make sure you are in the zm/mp/cp lobby before injecting
You can add and remove .gscc while in game

L1 + Dpad Right/Left to choose GSC Menu
L1 + R3 To inject GSC Menu
Then just start game and enjoy