Gaap (also Tap, Coap, Taob, Goap) is a demon that is described in demonological grimoires such as the Lesser Key of Solomon, Johann Weyer's Pseudomonarchia Daemonum, and the Munich Manual of Demonic Magic, as well as Jacques Collin de Plancy's Dictionnaire Infernal

These works describe Gaap as a prince in human form who incites love. The Munich Manual also says that "Taob" also provides medical care for women, transforms them to make it easier to get to a lover, renders them infertile, and rules twenty-five legions of spirits. The other sources instead describe Gaap as a president, giving him the power to teach philosophy and liberal arts, make others invisible, steal familiars from other magicians, make men stupid, and carry men between kingdoms; in addition to ruling sixty-six legions of demons. Johann Weyer also connects Gaap to necromancers, and states that he was first called upon by Noah's son Ham, along with Beleth. He was of the order of potestates.