I´m no guitar player but related to midi...Yes you can use your Zoom G7. I may think you can even use it USB MIDI.
Maistage has a very handy funtion - learn - when in layout view just click on a screen button > learn > you Zoom G7 button and it will correspond to it. Some other configuration may be needed but try for now that.
Post your results. Good Luck.
Thanks for the help. Tried your suggestion. Got the Epression Pedal to function. Footswithches are giving me challenges. Cannot get them to work as simple on/off swithes like you would on a pedalboard. They vare functioning but not the way they are supposed to. They are functioning like presets.
If you havr any ideas I would apprecite them.
I will continue to try.