There's a set of books titled Roster of Confederate Graves by the Georgia Division UDC, which lists all of the known locations (in Georgia and other states) of graves of Confederate soldiers from Georgia. This set of books is by no means 100% accurate, as far as having the correct spelling of names, ranks, regiments, locations of graves, etc., but may possibly help you find the grave or graves you are seeking. Many larger libraries with a good genealogical section may have this set of books. I suggest doing a search on WorldCat to see the nearest library to you having them. Good Luck!