Very good point. All GSP troopers carry P-25 portables. If they are assigned to any post where there is a local TRS the troopers all have those system on their portables as is the case in Gwinnett, Dekalb, Cobb, Atlanta, Valdosta, Macon, Savannah, etc etc the list goes on. BUT their dispatch for the most part are the old VHF 2 channel system. It would be far less expensive for GSP to move to a P-25 VHF repeater for each post rather than a statewide TRS to be built.Just be aware, that the GSP in the north metro ATL, can talk to Gwinnett<albeit encrypted>, Hall on their system through the Event TGID's when they are running safety checks, etc., besides on the trunked systems that are listed in the database. Check the wiki here also for the latest updates to P-25 by many of the state's departments.
Yes and this would keep everyone isolated. An Stateiwde TRS puts EMA, GSP, DOT, DNR (or GA's equivalent), Forestry, as well as every County having one system for interoperability. You may not have every agency in every County using it full time, but at least there would be a single platform for use, not ten different systems, for ten different State Agencies, and every City, County, Town etc all on there own systems....
I don't know about you, but I'd want my Public Safety Agencies to all be able to quickly and efficiently work together in an major event to help me than have them all spitting in the wind because they can't coordinate much less talk to each other.