I've been wondering the same thing about gyro for 3D planes. Haven't found a good answer yet, but can tell you that it seems to be a secret club. Nobody will admit to using gyro, because folks will make fun of them. But in secret, who knows how many gyros are hiding under the canopy.

Just saw an ad from hobby lobby taking advance orders on a new foam jet that comes standard with gyro for rudder, for use in 3D hovering. So there, the cat is out of the bag.