Great radio for a feed. On the 25 pin connector on the back of the radio, #7 is ground and #17 is line level receive audio. Perfect match for line in on a computer. DC coupled so a series capacitor is not a bad idea off of pin 17.
There are points on the radio that provide serial data as far as status of the radio. Third party manufacturers do use this data to query channel, scan, etc. You could use this to reference an alias table for alpha tagging however the protocol is not readily published. Could it be done? Yes. Easy? Not really, unless you can uncover some secret squirrel stuff.