You can give GATE exam with any percentage just like UPSE exams. And any number of times. It will lead you to PSU's, IIT's, NIT's & Research etc.. as per the company's requirements they might can ask for exams results as to select one in many candidates they could make it an eligibility. Otherwise there is no such conditions. You can go for higher studies & also get stependid to support your study.
If you're willing to go for it, it's a great choice.
All the best!!