I have to be honest, I attempted to listing every single event I found for homeschoolers but it was seriously too much! So I've decided to link you with some local groups!
Wisdom's Way Homeschoolers of Douglas County
West Ga Homeschool Group
Atlanta Secular Homeschool Group
PDWC Homeschool Group (Paulding, Douglas and Cobb)
Kid Cultivators *Amazing workshops for those starting out*
Ga Unschoolers
And for the most amazing collection of field trips join the SE Homeschoolers Group on Facebook!