As you are looking for important dates for ETS GRE Test held in Mumbai, so here I am providing important dates.

Important Dates
January 06, 2017 - Friday
January 11, 2017 - Wednesday
January 13, 2017 - Friday
January 15, 2017 - Sunday
January 16, 2017 - Monday
January 17, 2017 - Tuesday
January 18, 2017 - Wednesday
January 19, 2017 - Thursday
January 23, 2017 - Monday
January 24, 2017 - Tuesday
January 30, 2017 - Monday
February 01, 2017 - Wednesday
February 02, 2017 - Thursday
February 06, 2017 - Monday
February 07, 2017 - Tuesday
February 08, 2017 - Wednesday
February 09, 2017 - Thursday
February 10, 2017 - Friday
February 12, 2017 - Sunday
February 13, 2017 - Monday
February 14, 2017 - Tuesday
February 15, 2017 - Wednesday
February 16, 2017 - Thursday
February 20, 2017 - Monday
February 21, 2017 - Tuesday
February 22, 2017 - Wednesday
February 23, 2017 - Thursday
February 27, 2017 - Monday
February 28, 2017 - Tuesday

Test Centres
MUMBAI, 8921 INDIA - APCU-8921 2.53 mi.
PROMETRIC TESTING PVT LTD, 6th Floor,Techniplex1 (Gate No.2),Goregaon(W), Ratnakar Bank Building, Balwa Group,, Mumbai

Here I am giving contact information of Test Takers of GRE Test in India:

Mail: GRESupport4India@ets.org
Phone: 91-1244517127 or 000-800-100-4072 (toll free for test takers in India)
Working Hours:
Monday–Friday, 9 a.m. to 5 p.m. India Standard Time
(except for local holidays)