A9. Here is the eligibility criteria for GATE 2018:-

http://www.gate.iitg.ac.in/?page_id=49

I am sorry to tell you that your educational background does not lie under this criteria as it stands for Graduate Apptitude Test in Engineering and is an examination to test the comprehensive understanding of undergraduate subjects in engineering and technology.

Hence according to your educational background you are ineligible to appear for the same.