Hi Bhagyasri,

                      I am here to help you with your question. As you belong to other state(non-Tamilnadu) you can apply through management quota if you didn't write TNEA. You got 9.9 GPA that means 99%. Your marks are calculated for 200 by considering 100% marks from maths and 50% from chemistry and 50% from physics. Anyway even though your system is GPA but you will be given GPA for every subject.

For eg: if you got 10 in maths and 9.5 in both chemistry and physics then it means you got 100 out of 100 in maths and 95 out of 100 in both chemistry and physics that means based on above % consideration you will get 195 out of 200

        In this way, marks are calculated. So it doesn't matter whether it is marks or GPA.

If you feel anything wrong in my answer feel free to comment.

All the best.

Thank you.