Yes, ante litem notice is typically required before suing a municipal corporation or county. Ante litem notice is usually not required when suing for violations of federal civil rights, however. Essentially, ante litem notice provides notice to the county of a pending claim or potential filing of a lawsuit. In addition, remember that county officials are usually entitled to certain immunities, but their protection is not unlimited.
In 2008, I helped try a case in front of a jury where we represented a party that had been mistreated by a county in the Atlanta area. We recovered a six-figure jury verdict. Please call me if you would like to discuss your case further.
For a suit against a county government in Georgia, you must present a claim in writing to county commission within 12 months from the date the claim arose, and prior to filing suit.
You should consult a Georgia attorney regarding the specific facts of your case.