Ownership of flat to be changed in greater noida

Hi, my parents stay at Faridabad, before expiring in Nov 15, my father registered his WILL in Faridabad court. He gave the ownership of his Greater Noida Himsagar apartment (border roads society) flat to me (his son). How can I get the ownership changed in the records of Greater Noida authorities? please help Thanks Jatin Son of late sh. Gurcharan Singh 9828110206