Hello dear student,

If you want to take admission in IIT through gate anywhere else you need to mention your category in the form of gate it is found that bases your marks will be evaluated and your rank that is your category rank will come in the scorecard of gate and you need to show valid documents to take admission. If you have mention SC category in GATE form only on that basis you will get admission in IIT on the basis of their category. I hope this was helpful to you and the information was clear to you.

Best wishes