Hi Dacula - welcome to Atlanta scanning. First off, if you don't have a DIGITAL-capable scanner, you won't be able to hear Gwinnett, Hall, Forsyth, Cobb and before long, DeKalb, Atlanta or other agencies. Radio Shack sells their own brand as well as GRE scanners. Uniden sells the Bearcat line - all are good. I have the Bearcat BC396XT and listening to the digital systems (unless they're encrypted) is good. Hall has most of their system excrypted but the last time I checked, I believe Fire Dispatch is in the clear. Forsyth has an all-digital system and also simulcasts their Fire Dispatch on 154.010 (PL 131.8).
Hope this helps.Yell back if you need more assistance.
Mike
"Metrofire31"