So there's a sort of work around to this if you want to access both portals on the same device.
As @Mick_Ball already mentioned, a GlobalProtect agent installation can only be active on one portal at a time; in addition, you can only have one agent installation on any given machine. Using WSL or VMs gets around this limitation and allows a single piece of physical equipment to connect to both.
Click Accept as Solution to acknowledge that the answer to your question has been provided.
The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!
These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!
The LIVEcommunity thanks you for your participation!