Bluetooth keyboard on montana 700

Good morning to all

I am Andrea and I have developed a bluetooth keyboard for commanding the most used navi app on smartphones.

I am trying to figure out if it's also possible to do the same on garmin montana.

This navi is very common for example in the motorcycle rally races, and could be very helpful in my opinion to use a keyboard without leaving the handlebar.

The commands necessary are simple. 

Zoom in and out

Pan of the map

Orientation of the map

I am struggling in finding a way to do that, but seems this navi is not capable.

Is there a workaround process to make it possible?

I am speaking about reading a HID keyboard due to the type of keystrokes