Can a gift deed from parents be sold to someone - Indian Muslim Law

Hello Sir/ Madam. A part of my grandmothers self acquired property was given as gift deed towards livelihood to one of my uncle(Father’s Brother). My grand mother expired, my uncle is going through medical treatment due to brain stroke and paralysis - Now Mentally fully conscious with very limited physical movements. His wife and 2 sons have been staying away from him for many years and not responding to support his medical expenses or not willing for care taking. Family members and nearest relatives are supporting his medical expenses and caretaking through pooled money and resource. Now, he wants to sell off his property(Acquired as above mentioned), to me(Brothers son) to cover his advance medical expenses. Do we need his wife and sons consent and signature for this property registration? His wife and sons are not responding to contacts made to get them involved in his care taking Or medical expenses. Looking forward for your valuable legal guidance On this query please. Family Details - Indian Sunni Muslim Thank You Inayath