Geb, synonymous with Seb, an Egyptian clthonic or earth god, was worshipped in the Old Kingdom, from about 2000 BC to the end of the Egyptian era, circa 400 AD. He had no specific cult following but was associated with tombs. Being the offspring of Su and Tefnut, he was a "third generation" deity of the Ennead in Heliopolis and as the brother and consort of Nut
he becomes the father of Isis and Osiris in the Heliopolitan Theological System.
His depiction, appearing on papyri, comes from the New Kingdom and typically shows him wearing the crown of Lower Egypt, lying on the ground with arms stretched in opposite direction: one toward the sky and one toward the earth. When pictured with Nut, a sky goddess, his phallus is erected and extended toward her. He may also be accompanied by a goose, his hieroglyphical sign.
Geb is a vegetation god, frequently colored green with greenery spouting from him. He also is a god of healing, particularly petitioned to give protection against scorpion stings. Acting less benignly, he reputedly takes the souls of the dead and may imprison them to prevent their passing unto the afterlife. Also a god concerned with judgment he participated in the dispute between Horus and Seth. As the father of Horus, he presided over his son's crowning, and is committed to protect each rightful heir of the crown of Egypt. A.G.H.
Jordan, Michael, Encyclopedia of Gods, New York, Facts On File, Inc. 1993, pp. 87-88