Sam
Do did you ever hear about the “Ushpizin”? Do you say the Tefillah in the machzor about the Ushpizin? Do you believe that the Avos come visit us in our Succah? Do you think a goy “belongs” there?
Furthermore, Rabban Gamliels eved was an eved knani and is chayyiv in mitzvos (like an isha) and has a bris milah and his eved was a talmud chacham, dont compare an eved knani especially Rabban Gamliels eved to a stam non Jew, I think you are more learned than that!!!