Gateway Design Error

Hello

we plan a rollout of Scom Agents in an multiple  non-trusted domain Environment.

Some of the computers have to be in 2 Management Groups  ( Test / Prod). On the agent it can be defined an but only one GatewayServer is possible.  Can be somewhere on the Agent ( Registry ? ) define a 2nd Gatewayserver ? Or can be on the Gateway Server the 2nd ManagmentGroup be defined and so the Gatewayserver is in 2 Managemnt Groups ?

Thanks for any hints

Regards

Claus