FEMA is a federal agency and wouldn't have a Gaston Co. TG. I have not heard any permanent FEMA TGs on VIPER if needed they can be assigned and flashed into cache radios in the event of emergencies. Most counties and the state have local emergency management agencies, like what @JCFF54 showed you, but those are not FEMA.
Lots of municipalities have emergency management channels or talk groups but traffic is rarely heard on them. The local EMA director is a long-time friend of mine and he said he can't remember the last time he used his channel.
@brad24, seeing you are new, assuming you are new to listening, first welcome!
Lots of times local emergency management may be requested to large incidents. Big structure fires, multi vehicle MVCs, other special incidents, to mainly provide logistical support but also liaise and communicate with special agencies, such as state rescue teams and hazmat groups. Most everywhere thought Ive always heard them use the operations channels that the incident command is on.
I know of at least one town that has a EM channel, and its used for local EOC ops, during hurricanes. But normally its to request coffee between offices, etc. Nothing out in the field.
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.