All the Gocycles are compatible with the mudguards.
Out of the box the mudguards will fit Gocycle G2, G3, GS and GX.
Some of the earlier G2 models will need an extra bracket. If in doubt, please contact firstname.lastname@example.org.
For Gocycle G1 the bracket will need to be removed from the front mudguard and affixed directly under the front fork.