GAN connections status with redundant gateway?

Ignition 8.1.21

is there any System tags for the gateway (outgoing) connections Status. is a redundant gateway.
My backup server is not started.

what does means:
_0:0 and _1:0

Have you tried looking at the tag [System]Gateway/Redundancy/Connection/IsConnected?

Yes, the tag you mention is ok for the Connection status beetween of the 2 nodes of a redundant gateway.

In my use case, I have a "scaleout" architecture whith a front end server a some redundant tag and IO servers.

I would like to monitor the GAN connection between the front end gateway and others gateway

Gateway/Gateway Network/.. system tags from the front end server are not very explicit...