The Chida said that women can be taught Gemara; they just can’t be forced to learn. Maybe Rav Soloveitchik was relying on the Chida when he permitted teaching Talmud to girls (delivering the first lecture himself)? The Lubavitcher Rebbe said that now that women are more educated in secular studies they need more intensive Jewish education, and that it is mandatory to teach them Oral Torah. But what he meant by that was Ein Yaakov, not the Gemara itself.
