Have you looked in the statewide database? I don't live near you, but most of the State Patrol has been listed across the state.
If you don't know where to look, go to the Database tab off of the main RadioReference website. Click the Georgia state outline on the map. Once there, look down the right side of the page. You will find statewide groups, including the Georgia Department of Public Safety (AKA State Patrol). That opens another page with GSP frequencies by Troop and Post. I don't know which Troop and Post you need, but each Post has the covered counties listed. Or, click on this link:
http://www.radioreference.com/apps/db/?aid=816
For the counties near you, go back to the Georgia database page and click the appropriate county on the map.
Enjoy!
P.S., you are looking for frequencies; codes are verbal shortcuts used by public safety officers. Two different things.
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