O.C.G.A. § 44-9-4: Parol license; when revocable; when easement running with land.

A parol license to use another’s land is revocable at any time if its revocation does no harm to the person to whom it has been granted. A parol license is not revocable when the licensee has acted pursuant thereto and in so doing has incurred expense; in such case, it becomes an easement running with the land.