The Gusa Regional Science High School - X (Filipino: Mataas na Paaralan ng Agham Panrehiyon ng Gusa) colloquially RegSci, GSci or RS, is the Regional Science High School for Region X - Northern Mindanao. It is a specialized public science high school supervised by the Department of Education. It is the premier science high school of Northern Mindanao, and one of the two science high schools in the region, together with the Philippine Science High School Central Mindanao Campus. The school was established in 1994 as Gusa National High School - RSHS Annex. It became the Regional Science High School for Northern Mindanao in 2002 through the House Bill No. 3000 of the 15th Congress. From the name Gusa National High School-Regional Science High School Annex, it was then changed into Gusa Region