hˈæɹiət hˈɔːl hɐz dᵻskɹˈaɪbd ðə ɡˈæps dˈaɪət æz "ɐ mˈɪʃmæʃ ʌv hˈæftɹˈuːθs, sˈuːdoʊsˌaɪəns, ɪmˌædʒᵻnˈeɪʃən, ænd ʌntˈɛstᵻd klˈeɪmz", ænd kwˈækwɑːtʃ ɪŋklˈuːdz ðə ɡˈæps dˈaɪət ɪn ɪts ˈɪndɛks ʌv kwˈɛstʃənəbəl tɹˈiːtmənts.
Harriet Hall has described the GAPS diet as "a mishmash of half-truths, pseudoscience, imagination, and untested claims", and Quackwatch includes the GAPS Diet in its Index of questionable treatments.