Here is a link to the state DOR site that allows you to check by county. https://etax.dor.ga.gov/ptd/county/index.aspx
Remember you have to been the occupant of the property on January 1st of this year in order to receive this benefit in 2011. All counties require you to file the exemption by the 1st of April. Happy house hunting!
Academy Residential Mortgage
"School Tax Exemption for individuals 65 or older: Any individual 65 and older may qualify for a school tax exemption. You must file for the exemption prior to April 1st to receive the exemption for the current tax year"
Georgia Mountains Group
Atlanta Intown Real Estate Services