Anything you do in juvenile doesn't matter, when you turn 17 that's when you're an adult and everything you do counts. If you plead under first offender act, you don't plead guilty or no guilty, it means it allows courts to sentence you on terms and if completed, it wouldn't be "considered" as a felony, ok here's the tricky part, if it's a felony and FOA, you have to WAIT 5 years AFTER discharge of FOA probation to beable to apply for permit, you also have to have the discharge paperwork to attached with it. Like some people here say, it will be on your record until you get your probation officer to submit the discharge paperwork to gcic which is the gbi. Apparently it's not their job to update your record. That's it! You have to wait 5 years until you get permit but here's the weird thing, I've talked to NICS and they a person who completed FOA may pass a NICS for purchase and law states that You are NOT allowed to possess firearms WHILE under FOA probation(standard requirements for probation anyways) but once you complete and off probation, you can possess and own and purchase firearms, you just CANT carry till you get your permit which I said, 5 years after discharge date of first offender act.
So here to sum it up, get your FOA update thru gcic by talking to your probation officer or go to court and get certified copy of the discharge and probation termination then send it to gcic. Takes about 4 weeks for gcic to update but if probation officer does it, it updates within 24 hours. I did it by myself because the time PO takes to dick around would be the same amount time or you can do both to guarantee it. Wait 5 years after discharge date to apply for carry permit, but till then you have to go they NICS check when you buy but under NICS standards, anyone under FOA can pass.
So here to sum it up, get your FOA update thru gcic by talking to your probation officer or go to court and get certified copy of the discharge and probation termination then send it to gcic. Takes about 4 weeks for gcic to update but if probation officer does it, it updates within 24 hours. I did it by myself because the time PO takes to dick around would be the same amount time or you can do both to guarantee it. Wait 5 years after discharge date to apply for carry permit, but till then you have to go they NICS check when you buy but under NICS standards, anyone under FOA can pass.