During his lifetime a man made a gift of a house to one of his wives.

Answer

Yes, she will inherit jointly with the other wife in all the assets left by the deceased husband. Whatever belonged to the husband on the day of his death will be inherited by the heirs. The two wives will jointly inherit one eighth of the assets of the deceased. They will share this one eighth equally. If the husband had unjustly favoured her with the house during his life time, he will answer for the injustice by Allah Ta'ala. But, his injustice does not affect her right of inheritance.