crash - all is cool but personally I just wouldn't describe things as reversed. Forward stick still pitches the nose of the aircraft down, back stick pitches nose up. Right and left stick still roll the aircraft right and left.
Low rotor rpm in a [functioning] gyro is not possible without unloading the rotor - which either means pilot induced [via forward stick] or a great deal of turbulence [the likes of which would not be ambiguous!]. However that is not a stall. I'm unaware of any gyroplane flying that has the ability to stall the entire rotor, certainly not one being operated within the limitations of the POH.
I agree that a very nose high attitude could create the differing response if indeed your fixed wing response is to push rather than simply release the back stick...I'm just not sure I'd describe that as the reverse its just a different response.