Correct me if I'm wrong, but isn't the gluon the quanta of the strong force? Thus the strong force wouldn't bind gluons, but it binds the other particles via gluons.
See the last paragraph: the strong force is special in that the mediating particles have color themselves, and so bind to one another. This effect is what makes the strong force strong - it actually increases with distance. Actually, the W bosons have weak charge, but the self-binding is minimal because they are very massive and thus short-ranged.