If you have multiple instruments inserted into a single Kontakt instance, you can easily route each instrument its own audio output pair so that you can subsequently route each instrument through different effects in Gig Performer. The easy way to do that is to insert your instruments in Kontakt as usual and then use the Batch function, “Clear output section and create one channel for each loaded instrument”.
Click on this article to learn more: https://gigperformer.com/how-to-route-different-kontakt-instruments-in-a-multi-to-different-audio-outputs/