Under Muslim personal law, a grandson can inherit from their grandmother's property if their father (the grandmother's son) has passed away. Muslim inheritance is governed by the Muslim Personal Law (Shariat) Application Act of 1937. Property is divided among legal heirs, classified as sharers and residuaries, with specific proportions determined by Shariah law. Grandchildren are considered direct descendants and are entitled to a share, with a grandson typically receiving a portion even if their father is deceased.