Xavier Institute of Management and Research

You can consider JBIMS, KJ Somaiya, Sydenham and Welingkar for MMS.

Yes, you can and there is no procedure for it though. You can either apply for any competitive entrance exams for this or next year effectively or join any MBA college or B-schools which still have admissions left. Although percentage or CGPA at least till 65% of full-time degree are sometimes taken into consideration while applying for admission.

Package wise yes
MET has gone down drastically
Xaviers highest packages (hope this is what you want to know)
Finance 10.8
Marketing 9
HR 9

It's dubious considering the fact that the number of candidates have gone up.
Still check the XIMR office administration.

There is no GDPI as such. Just go and only meet the administration guy in XIMR. He will help you out.

If you seriously look forward to make it, get in touch with XIMR office.
Dates are not put up yet.

XIMR considers CET.
MAT may be considered, if there are any seats available.
Kindly check with XIMR's office.

If you are from Mumbai, go to Sydenham (FC & ARC) and sort it.
Your list depends on what you have filled at the FC to my knowledge.
Check with other guys too.