GSSS DADAHU was established as Primary School on 12 October 1918. It was upgraded to Middle School on 02 October 1940. Further upgradation resulted in the institution given the status of High School on 01 June 1953. Finally, the prestigious institution escalated as Senior Secondary School on 01 August 1994 and has set numerous examples hence becoming a pioneer and visionary educational institute in the State. It is managed by the Department of Education, Government of Himachal Pradesh. It is located in Rural area. It is located in DADAHU block of SIRMAUR district of Himachal Pradesh. The school consists of Grades from 6 to 12. The school is Co-educational and has an attached pre-primary school as cluster. Hindi is the medium of instructions in this school. This school is approachable by all weather road. In this school academic session starts in April.

         The school is run in Government buildings. It has sufficient classrooms for instructional purposes. All the classrooms are in good condition. It has other rooms for non-teaching activities. The school has a separate room for the Principal and administrative office. The school has Pucca boundary wall. The school has all basic amenities and a playground. The students are provided mid-day meal which is cooked within the  school premises. Apart from regular curriculum, vocational education has been added to strengthen overall development of students taking into account skill based knowledge for future endeavors.