O.C.G.A. § 53-4-4: Incorporation of extrinsic documents into will.

(a) Any writing in existence when a will is executed may be incorporated into the will by reference if the language of the will manifests this intent and describes the writing sufficiently to permit its identification.

(b) This Code section shall not be construed to imply that the common law does not permit the incorporation of an extrinsic document into a will by reference in the manner authorized under subsection (a) of this Code section.