Yes, you are Eligible for Maharashtra PG Entrance Exam without doing MBBS degree from maharashtra, as the eligibility conditions for the Maharashtra Pg Entrance Exam says:

“students who have acquired admission under 15% quota for All India Pre Medical Test Entrance Exam for MBBS course in the medical college situated outside Maharashtra State and who have acquired the degree from a University situated outside the State of Maharashtra will also be eligible for PGM-CET-2014.”

Important dates:
Online Registration & filling application form: 28th Nov 2013 to 12th Dec 2013
Schedule for Fee Acceptance at SBI Bank through computer generated challan 30th Nov 2013 to 16th Dec 2013
Issue of Admit Cards (Online): 30th Dec 2013 to 04th Jan 2014
Date of Examination: 05th Jan 2014, (Sunday, 10.00 a.m. to 01.30 p.m.)

MHT CET PG Syllabus