Barrow county is currently on a digital VHF P25 trunking system, however, this is slated to change to become a P25 phase 2 system on 700MHz by the end of the year, so plan on buying a scanner capable of Phase 2.
Be warned, that police/law enforcement talkgroups are encrypted, and cannot be monitored on any scanner. Fire and EMS and others like animal control are not encrypted, but that can always change at their discretion.