Gandaki Boarding School formerly known as Nepal Adarsha Bidhalaya was established on 11th June 1966 as a result of the initiation of three groups: i. The United Mission to Nepal. ii. The Shining Hospital and iii. The Local Community,with a view to imparting quality education of an international standard.

Initially the facilities were primitive with all the thatched-roofed buildings mud and bamboo. There were only 45 boarding students, who were catered for by 5 teaching staff. It was designated as a co-educational regional school in 1985 with English as the medium of instruction in an agreement between Nepal government and the United Mission to Nepal.

The First batch of 10+2 students was enrolled in 1992.Prior to the commencement of 10+2 education; students were prepared for O level study for a number of years. It has been running classes from grade four to bachelor's level. It offers plus two program in Science with the affiliation of NEB; the Cambridge International A-Level program and  Its sister organization offers B.E. in Computer Engineering (software) with the affiliation of Pokhara University.

The facilities and resources of the school for both boys and girls include well-equipped classrooms, library, labs, gymnasium, playgrounds, a health centre and ten hostels. Academic performance has been excellent both in SLC and 10+2 exams. It has been awarded the Birendra Regional Education Shield for 16 times so far for its best educational accomplishments in the Western Development Region.

Moreover, according to the report on the evaluation of the Higher Secondary Education in Nepal made by Himal and Nepal, national journals of Nepal , Gandaki Boarding School has been ranked the best Secondary School in the country on the basis of 10+2 results over several years.

GBS graduates pursue their tertiary education mainly in technical fields required in various areas.

Many of its ex-students have scattered throughout the country taking up numerous key positions, making a tremendous contribution for its development.