GMAT Scores

According to my knowledge for MBA in any IIMS, you need to give CAT exam there is no IIMs who except GMAT score.

Your GMAT score is fine, means (Good > 630 > Average). Your college, class 10th and 12th score is also fine. Now, depending on your non-academic profile and job experience, I would suggest you to apply for some other good college as well. IMT (it is not specifically mentioned) doesn't accept GMAT but they do accept CAT and MAT. Anyway, IMT is good and so your profile, but apply for other good universities as well.

Yes, the admissions are based on GMAT score, hence if you score good and get a rank in top 100-300 then you will easily get a top college. Also, anywhere above 1k is also a good rank.

Yes, if you have a very good score, then they might give you a scholarship but not 100%.

For full time MBA, one must have at least 50% marks in graduation.

Yes, colleges such as SP Jain do accept GMAT score.

Hii Akash,
Yes, you can do this. In fact, some colleges like (ISB Hyderabad, IIFT Delhi, MDI Gurgaon etc. ). Are some of the top-notch colleges that require a GMAT score. ISB, Hyderabad admission is based on your GMAT (regardless you are Indian or not), similarly MDI and IIFT Delhi do accepts your GMAT or CAT any one). So, you may search on their website that the criteria for MBA admissions (90% chances are that they do allow GMAT for Indian as well).
Hope this helps. Upvote the answer if you feel satisfied. Ask any query at any time. Good Luck.

Hi Shubham,
You might either need to look for other business schools or work on your GMAT score. While 650 is a great GMAT score, Columbia Business School has had an average of 724 in 2017. All the best.