The Gronk Papers include a diverse range of materials that span the entirety of Gronk's career, from approximately 1969 to 2007. These include materials related to his work with Asco (including members Patssi Valdez, Harry Gamboa, and Robert Legorreta), his collaborative works and correspondence with artist Jerry Dreva, documentation of the artist's exhibitions, photographic materials (slides, transparencies and prints), thousands of original drawings and watercolors (both loose and in sketchbooks), materials related to his production designs for theater, correspondence and mail art, press clippings and realia, and artwork collected by the artist.