Gonzo K.K. (Japanese: 株式会社ゴンゾ, Hepburn: Kabushiki-gaisha Gonzo) (formerly GDH K.K.) is a Japanese anime studio owned by ADK that was established on February 22, 2000. Gonzo is a member of The Association of Japanese Animations. The company's predecessor Gonzo Inc. was established on February 11, 1992, by former Gainax staff members, but was later absorbed into its parent company, GDH K.K. on April 1, 2009, and it would assume the Gonzo trade name for itself.
Gonzo has not released a major animation project since 2020, with Phantasy Star Online 2: Episode Oracle being the studio's latest major work.