Since Gertz founded Zorro Productions in 1977 he has been responsible for four Zorro motion pictures, including “Zorro, the Gay Blade” (1982), “The Mask of Zorro” (1998), and “The Legend of Zorro” (2005), the two last starring Antonio Banderas and Catherine Zeta Jones. Also under his tenure, ten different Zorro TV series and made-for-TV movies have been produced, as well as more than fifty different Zorro stage productions. Zorro Productions has executed over a thousand license agreements in such diverse areas as book and comic publishing, theme parks, commercial endorsements, apparel, food products, computer games, and toys. Zorro Productions holds hundreds of copyrights and over 1,300 registered trademarks in the property of Zorro. In 2005, together with world-renowned author Isabel Allende, Gertz released a novel about the genesis of Zorro. Allende's Zorro: A Novel reached the NY Times bestseller list, has been published in some 30 languages, and is the subject of a TV series currently in development at SONY Pictures.