A character by the name of Giumaho does not appear in the film Dragon Ball Z: Dead Zone. The primary antagonists in that movie are Garlic Jr. and his two main henchmen, Ginger and Nicky. A third henchman, Sansho, also appears alongside them. It is possible that the name in question is a misspelling or a conflation of these characters, or stems from another piece of Dragon Ball media such as a video game or non-canonical guide. Based on the available information from the film itself, no character named Giumaho exists within its story.