When you say Grace Quilting Pro, do you mean GMQ Pro? Is it one of their older frames?
I had a Bailey 15" on a Little Gracie II frame, and it fit, but I would not have gone up to a 17" -- it would have been wasted space, because the quilting space on the frame itself is only so big. I don't think a machine that size would have fit on the carriage, either. But it depends on if your frame is bigger than the LG II frame or not -- I have a Pinnacle now, and a 17" would fit fine.