The word "gonzo" typically refers to something unconventional, wild, or extreme. Therefore, its antonyms may include words like conventional, subdued, or tempered. "Ordinary", "typical," and "mainstream" are also antonyms of "gonzo". Words like "boring," "unremarkable," or "tame" are also fitting antonyms. Moreover, words like "balanced," "circumspect," or "moderate" are antonyms of "gonzo" in terms of the approach or attitude. "Conventional" and "orthodox" can also be used as antonyms of "gonzo" in relation to style, methodology, or technique. In summary, the antonyms for "gonzo" conveys a sense of reasonableness, sanity, and conservatism.