Hello Admin
Thank you very much for your help.
The solution for the S2S would work as long as we have only one target environment or if we have different subnets in the different target environments. But we will have multiple target environments (different GW B) always using the same subnets, and so it can't be handled with routing on GW A.
But we will find a solution, either via the VDI environment in the corporate network which is then used as a jumphost where we again use the checkpoint VPN client to connect to the different GW B's or by placing another VPN product in the target environment behind the second checkpoint that terminates the VPN (e.g. openVPN).
I just wanted to make sure it really wasn't possible before designing a workaround, and with your answer it's clear now.
Thank you very much.