Bill,
Ah ok.
Taking the point re the angle of attack - you are correct but the effect is very small as the speed range is from 0 to tail lift velocity.
There is no or very little airflow from the planes motion, it's all or nearly all from the prop. A high AOA (pitching moment) or yaw angle while the aircraft is already traveling at a high velocity is an other story altogether as a lot of air feeds in asymmetrically.
Taking your point re a pitching moment ,while the tail is lifting ;
This a negative pitching so the gyro-p acts opposite to how it does when the pitching moment is positive.

Brian