Law About Inheritance

Aoa, I want to know that my father died in 2004 when my grandfather was alive. After 4 year grandfather died. Now inherited property is going to distribute. My question is that can we or my mother will get property in inheritance? Please guide me in the light of Pakistan laws of inheritance or Islamic laws.

@Muhammad Usman, what are the number of legal heirs of your Grandfather,(daughters and sons).Secondly did your grandfather in his life,after death of your father left any specific Will against his property?