Is it permissible for my sisters not to wear Hijab (veil) before my grandmother's brother whom we regard as our maternal uncle?
Please answer my question, may Allah guide you and grant you success. He is All-Hearer and Responsive.
The grandmother's brother is regarded as a maternal uncle of the daughters and granddaughters of the grandmother. He is a Mahram (unmarriageable relative) to them, and hence they are allowed not to wear Hijab in his presence. May Allah grant us success. May peace and blessings of Allah be upon our Prophet Muhammad, his family and Companions!