Notification Condition or Report for no GUP communication for "Explicit GUP for roaming clients"

I've configured my LiveUpdate Content Policy to use "Explicit GUP for roaming clients" while on my internal network.

Curious to see if anyone found a way to alert on cases where:

The client can't communicate to a GUP for updates = GUP is down or non-responsive

The client has moved to a different network, which has no GUP defined.  = Policy needs to be updated to define the unknown network.

I fear clients either not getting updates and/or trying to overload a WAN link by getting updates from the Managers in other geographic site.

Thanks in advance,

Rich