Here are two sites with information on the battalion. They did see a lot of action.
He was recorded on the May/June, 1863 muster roll as absent sick. These bi-monthly musters were usually held the last day of the period, June 30 or as soon there after as possible. He is present at the nest muster Jul/Aug. He very well might have missed Gettysburg.
http://scvcamp1399.org/units/2ndGA_Battalion_CoA-B-C-D.txt
Gettysburg after battle report:
Report of Capt. Charles J. Moffett, Second Georgia Battalion.
http://www.civilwardata.com/active/hdsquery.dll?RegimentHistory?297&C