Web Gateway Managing Multiple Management Portals

Hi all!

I'm currently trying to find out how to have one Web Gateway route to multiple servers Management Portal. The only thing that I have come up with so far is to potentially make different routes per server?

I have a development, test, and production server and I want to use the same Gateway server using IIS to do SSL/TLS encryption for the CSP pages.

Any ideas or recommendations to pull this off?