Rudder isn't strictly needed to unstall the low wing and can make things worse. Use of rudder is a bit of a 'cheat' as my understanding is that you are using it to increase the speed over the wing to above the stall speed. Using lots of rudder near the stall can have catastrophic side effects (i.e a Spin) from which you may not recover if near to the ground.

DelGatoGrande is correct in his understanding of the effect of a gyro following a stall that causes a wing drop, however you shouldn't cut your margins so tight that this is a factor. If this does occur at height, you can still unstall the wings by reducing the angle of attack (even with full aileron) but it might take a bit longer to recover. As soon as the wing is unstalled then the gyro will immediately start helping again.

FWIW, I am going to install a gyro on my next model.

Sorry, I will get back to the SU27 now

p.s. This is only a factor if you have a wing drop at the stall which isn't always the case.