Q. A non-Jewish couple that don't have any children, are best friends to a couple celebrating a bris and are attending the ceremony. Can they be given a cheik kivud and hold the child before or after entering the shul proper, or maybe before or after the baby is given to the Kvater?
A. Horav Slomo Miller's Shlit”a opinion is that it is recommended not to give Gentiles any active part on a bris ceremony. If it can not be avoided, it should definitely not be done in shul but outside, before transferring the child to the k'vater. (See Chasukei Chemed -Yuma 26a, in regards to dividing the honor of k'vater into two parts and honoring two couples. See Aleinu Leshabeach 3: 694 regarding if a non-Jewish father can be a sandek each. See also question 1084 in this forum, in regards to reciting a Mi Sheberach for a Gentile).
Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a