IITH offers the following 3 Years M.Tech programs and for admission to the 3 year (Research assistance ship) Masters program you need a valid GATE score. The applicants also have to clear an interview in order to secure admission to the 3 year M.Tech program. The financial assistance for this program is form funded research projects at IITH. Therefore, the number of seats available in the program varies from year to year.
More about GATE examination can be found here