General Tiburcio de Leon National High School, also known as Gen. T. de Leon National High School or GTDNHS is a public national high school in Valenzuela, Philippines. It is under the supervision of the Division and City Schools - Valenzuela. Founded in 1969, the school had first served as an annex to Valenzuela Municipal High School. Since 1997, it had become a fully independent high school in Valenzuela. Its location has been moved several times, from Gen. T. de Leon Elementary School, to Tañada Subdivision to its present location in Mercado St. near T.