VIPER has allotted talkgroups to all NC Counties, you can kinda tell which Counties aren't using VIPER due to the same exact 6 talkgroups for each County has (Fire, EMS, Law, Emerg Mgmt, Tac, Mutual Aid). The ones that do use VIPER will always have more than just 6 channels. Gaston County does have plans to switch to VIPER in the near future but it's a slow process right now. The guy that climbs & builds the towers is a friend of mine and he's already started moving decommissioned equipment off them to make room.
David