How can we get GTA to Auto resolve alerts based on Up status?

Good morning Darren, 

Yes, all ServiceDesk Incidents have the possibility of being auto-resolved.  There are two ways you can close Incidents outside of manual closure by a technician. 

The first option is to do it via Trigger.  The system checks to see if a trigger can apply to an incident when the incident is created or updated.  If you want the closure to happen as soon as an incident is created or updated, this is the one you'll want to use. 

You can find out more about triggers and how to set them up by clicking here. 

The second option is to do it via scheduled action.  The system checks to see if the scheduled action should occur at intervals that you choose.  If you want the system to check for incidents that need to be closed every hour or so, and not immediately upon creation or update, this is the option you'll want to use. 

You can find out more about scheduled actions and how to set them up by clicking here.

If you need further assistance setting either of these options up, or would like an example of what your trigger or action schedule should look like,  just let me know and I'd be happy to set these up with you!