GATE Scores

Yes, you can apply for Visakhapatnam Steel through GATE 2018.
Good luck.

There are over 206 M.Tech colleges in Maharashtra. Please refer to the link provided below for a detailed list of these colleges. You should be able to navigate to a college of your choice using the filters on the web page. Regards. https://www.shiksha.com/engineering/colleges/m-tech-colleges-maharashtra.

Of course, you can pursue M.Tech twice, but both M.Tech have at different duration of time i.e after completion of first, you can do 2nd. Or, you have do 1st as distance learning mode and at the same time you could take admission in 2nd M.Tech degree with your valid GATE score card. Hope, I have given complete details regarding your doubt.

Please check for your eligibility to apply for the PGCET examination from the criteria mentioned at the link provided below:
https://www.shiksha.com/mba/exams/Karnataka-pgcet.

Yes, you may get. You have a fair chances of getting a seat in IIT just wait for counseling procedure that is CCMT but I have doubt that whether this IIT offer this course in which you want to take the admission since many other IIT too offered this course but this IIT does't because last year also this IIT did not release the cutoff for power electronic. So I suggest you take just verify whether the course is available in the IIT or not. Also check other IIT like Delhi, Bombay this might offer seat in power electronic.

GATE exam is conduct for 100 marks only, how can you get 369.

You will not get any decent college. I would suggest you to drop a year if you can & again prepare for GATE.
All the best.