The complete whole and the complete Absolute Truth are the complete Personality of Godhead, Śrī Kṛṣṇa. All manifestations are due to His different energies. He is the complete whole.
It is also explained in the Gītā that impersonal Brahman is also subordinate to the complete Supreme Person (brahmaṇo hi pratiṣṭhāham). Brahman is more explicitly explained in the Brahma-sūtra to be like the rays of the sunshine. The impersonal Brahman is the shining rays of the Supreme Personality of Godhead. Impersonal Brahman is incomplete realization of the absolute whole, and so also is the conception of Paramātmā.