What is the grandson's share of his grandfather's inheritance if his mother died before her father? And what is the ruling of Sharia and Egyptian law on this matter?

A daughter who dies before her father does not inherit from him, and consequently, her son does not inherit from his grandfather. The Egyptian law that mandates a bequest for the children of a daughter who died before her father is not based on Sharia. If a grandfather dies leaving behind only a wife and two sons, the wife receives one-eighth, and the remainder is divided equally between the two sons. If the aforementioned daughter were alive at the time of her father's death, she would inherit along with the wife and the two sons, with the male receiving a share equal to that of two females. Inheritance matters should be referred to Sharia courts or discussed orally with scholars due to their complexity and intricate nature.