Maternal grandparents died interstate grandson wants to claim share

Maternal grand parents did not make will and left a bungalow worth 1 crore in Mehsana city of Gujarat India. Those grand parents has two daughters and one son. Son has a hold on property and those daughters are ashamed to ask for their share because they are from a good family .But one of the grand son (son of one of these daughters) is interested in have share for his mother...(even though mother does not want to file a case) ..can he grand son initiate an civil action on his own?