No it's not beyond the capabilities of Sentinel.
You have Systems and Departments in Sentinel. You enter GPS coordinates for a Department by clicking on the Department in the Favorites List editor, then going to the Location tab.
You can probably create 90+% of your favorite list by using the "Add Channels On Range" tool in Sentinel. Specify your location, the Service Types you're interested in, and a Range setting, and it will put everything that matches in the Favorites List of your choice. Generally the easiest way to use this is to have a high Range value, then manually delete anything you don't want or can't pick up. It takes less than 5 minutes total, no looking stuff up manually required unless you're monitoring some really oddball or secret squirrel stuff.