Gil Niles Gender: Male Portrayed by: Jonathan T. Floyd First Appearance ● NCIS: High Seas (episode). Last Appearance ● NCIS: High Seas (episode). List of Appearances Gil Niles is a Petty Officer in the United States Navy who is assigned to the U.S.S. Enterprise. BiographyEdit Pre-SeriesEdit NCIS Season 1Edit Retrieved from "https://ncis.fandom.com/wiki/Gil_Niles?oldid=117483" Categories: Americans One-Off NCIS Characters Naval Officers Suspects Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.