Samar National School Gabaldon Building is a Registered Property, City of Catbalogan, Samar located at Catbalogan City, Catbalogan City, Region VIII.
Although Catbalogan High School was established in October 1903 as the first provincial high school in the whole island of Samar, classes formally started in January 1904. The Samar High School building was inaugurated in 1917, during the incumbency of Governor Clodualdo Lucero. During the inauguration of the school building, its name, Provincial High School was also renamed Catbalogan High School, a name by its three initials CHS at the center of each of the wrought-iron arches that crown the portals of the building this day. Later, the Catbalogan High School was re-baptized Samar High School. The Gabaldon name was taken from the name of Assemblyman Isauro Gabaldon of Nueva Ecija who authored Act No. 1801, which appropriated one million pesos for the construction of school buildings in every municipality in the country.