The exemption is found under Georgia state income "Here's the income that Georgia handles differently" "Retirement Income Exclusion" For both of us over 65 it should be $130,000 and only shows $57,817. In 2020, we had slightly more income and didn't have to pay Georgia tax. Georgia also doesn't charge tax on SS.
Here is a way to calculate it per Georgia tax.
https://smartasset.com/retirement/georgia-retirement-taxes#1y6ES8PcZO
