As you asking for the Admission procedures of the IITs for M.tech course here I am sharing with you some general procedure of Admission inot the M.tech course that are given below:

Important Parameters of the Admission Process:

GATE Score - All colleges prefer applicants with a GATE score.
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Interview Round - This round tests your technical skills, basics and concepts about the desired M.Tech course and a couple of HR/personal questions. If you've not managed to score in the GATE exam, this is a bonus round. It varies from college to college but most colleges have started conducting an interview session.

Engineering Academics - Even though GATE exam is based on the entire syllabus of engineering, few colleges prefer to go through the undergrad academic record of the candidate. So, if you've preformed excellently, the balance tilts in your favour

General Flow of M.Tech Admission Process:
Appear for GATE
Keep track of notifications announced by various colleges offering M.Tech program. This might be the most gruesome part as there is no Centralised
Admission Process.
Fill up the application form (mostly online) along with the prescribed application fee before the deadlines.
Once the results are declared and your name appears in the final list, confirm your admission by paying up the tuition fee.
(If there is an interview round) Once the shortlisting of applications are done, selected candidates will be called for an interview round after which then the final list of selected candidates for M.Tech program will be declared.

Documents Required during the Admissions:

GATE Score Card
Engineering Academic Record (Marksheets)
Receipt of the Registration/Application Fee