The ICG180 is pretty much the low end of gyros. It is not heading hold, and does not have remote gain control.

The lack of heading hold won't stop it helping you with hovering, but the gain control will.

The gain required for the gyro to actually have a noticeable effect will be too high for normal flying. The effect of excessive gain is that servo, rudder, elevator, whole plane oscillate back and forth rather violently.

The effectiveness of the control surfaces is part of the overall gain of the gyro control loop. The throws you use for pattern flying compared to 3D flying give you some idea how much the gain will change.

Heading hold (AVCS in Futaba speak) is usefull in hovering, but not in forward flight. Futaba make gyros intended for airplanes that have remote gain, and can select between normal mode and heading hold. One model will control two axes. You would nomally put the gain control channel on a switch, and switch to high gain as you enter the hover.

As you get better, you will be able to reduce the gain setting until you can hover gyro-free.