Ga. Code § 44-2-28
When any deed, mortgage, or other instrument conveying an interest in or creating a lien on real property refers to the boundaries, metes, courses, or distances of the real estate delineated or shown on any plat of the property or on any blueprint, tracing, photostatic or digital copy, or other copy of the plat which has been recorded as authorized in Code Section 44-2-26 and when the deed, mortgage, or other instrument states the office, book, and page of recordation of the plat or of the blueprint, tracing, photostatic or digital copy, or other copy of the plat, the reference shall be equivalent to setting forth in the deed, mortgage, or other instrument the boundaries, metes, courses, or distances of the real estate as may be delineated or shown on the plat or on the blueprint, tracing, photostatic or digital copy, or other copy thereof.
OCGA § 44-2-28