Grandson's right in grandfather's property

We belong to Sikh religion.My father lives in their grandfather house for 20 years they have proof.My father's grandfather treat my father as their son. My father's grandfather has 4 children ,three son and one daughter .One son has died .My father's grandfather does not make a will for anyone .And now if my father wants a share from their grandfather property...is my father has right to ask for share .My grandfather if does not want to give share to my father...is my father can take action from their father.? Can anyone help me out from this problem.Is grandson has rights on their grandfather property?