I don't know of a Georgia specific firearms instructor certification. I am going throught the process to become an NRA certified instructor in several different courses. There is a Georgia Specific Hunters Education Instructor. I am one of those as well and can get you in touch with the folks you would need to talk with to become one.
Gunny, I'm not sure of any paticular course for Georgia either. That's why I asked on here. I figured someone might know more than me. I google'ed it. Couldn't find much. I do know that NRA has courses to become instructors, but I don't think that's what I am looking for. What I was looking at stated "Georgia Firearms Instructor Certified". So yea... Hopefully someone else on the board knows.