One of the questions we frequently get asked is can Jamba be used with GCP.
The short answer : Yes.
The long answer : GCP comes with an in-game mod which overlaps in a few small ways with Jamba, so GCP detects Jamba and avoids these conflicts.

Zwipple has posted some tips on our forums to integrate GCPs window / leader switching with Jamba - Thanks Zwipple.
Also thanks to Jafula for this excelent mod.

Enjoy your Boxing

Phil