ATEM Compatibility w/Gefen Switcher A/V Cinema Scaler Pro II

I am looking to connect my ATEM production studio 4k HDMI output to a
Gefen Switcher A/V Cinema Scaler Pro II HDMI input. Both take and receive HDMI type A so it should work correct? Any known issues?

Be sure you use rhenProgram Out HDMI, and not the Multi-view. Should work as long as the Gene can use the ATEM resolution setting.
Cheers