Without knowing for sure let me say that I think they will fit.
The rear wheel uses a 20mm axle so that wont be a problem. Depending on the
front fork, some GGs have a 25mm axle and others have a 20mm front axle. The 20 will fit with the 20s and the 25 will fit with the 25s. Further, if the hub has an o.d. of 42mm, it can be made to take either 20 or 25mm bearings.(20x42 or 25x42).
Hope this helps,
Tony