I completed co op campaign and I still don’t have Gilded Kait.
did u play gears 4 between june and sep 2019 to trigger this?
The challenge ended September 2nd. If you completed after that date then it probably didn’t count unfortunately.
If you have the “Roads to Gears 5: Gilded Kait Achievement” in Gears 4
But still have not received your gilded Kait, probably have to contact support. See article below