A: See an estate lawyer in Georgia for help. Presumably, a court has appointed an executor. If you have a problem with how an executor is handling an estate, the usual first step is to demand an accounting of the estate.
A: If the will was probated, then it should be in the files of the Probate Court of the County where your grandfather lived when he died. This is a public record, and the Probate Court should provide you with a copy of this for a small charge.
If the estate was never closed, then you can demand an accounting from your uncle for the estate. You may have some statute of limitations issues depending on what has been done with the assets that may keep you from recovering. See an experienced probate litigation attorney.