I believe he wants Fx's fed to his in-ear monitor feed at Church. The console brand, analog or digital is irrelevant. Regardless what it is, we know from his explanations, it has a monitor feed to him on stage. Just need to add his preferred effect to his monitor feed.
What's missing is what is creating the missing effect. Is it the Kemper, GB or some other device? Determine what is creating effect and add it to his monitor feed, either as an external device or duplicate the settings internally using on-board effects if possible.