Gift deed

My grand mother wants to gift her self acquired property (small building )to me , I consulted one of the panel of experts , he is guiding me to get a family tree certificate with adhar card number of all of those children's , we don't have and their details and there is a quarrel between us and them, me and my grand mother were thrown out of house, I am looking after her I don't have parents financially we are weak please some one help on this?