Yes, the Maxilock runs very well on my Gammill. (I do not use other brands of serger thread, only Maxi). I have heard that Pam Clarke uses serger thread (hope I am not spreading a rumor here). I have used Maxilock when quilting charity quilts because the cost of the serger thread is less than the thread I purchase for myself, such as King Tut.). I think most people that quilt charity quilts provide the thread like I do.