O.C.G.A. § 53-12-411

A trustee shall allocate to income an amount received as a distribution of income from a trust or an estate in which the trust has an interest other than a purchased interest and shall allocate to principal an amount received as a distribution of principal from such trust or estate. If a trustee purchases an interest in a trust that is an investment entity, or a decedent or donor transfers an interest in such trust to a trustee, Code Section 53-12-410 or 53-12-431 shall apply to a receipt from the trust.