Yes, if it is done within the appropriate time ftame.
Only for some specific good cause. Very limited in GA. Low chance of getting a good result. Expensive in terms of legal fees.
It depends how long ago the conviction happened. Sometimes we can get the prosecutor to consent to reopen even if it is an out of time Motion.
It also can depend on the jurisdiction of the case.
For more info, visit my website at www.LevinLawyerGa.com