So if you are wondering how to quickly set a deadzone for gimbal, you can’t. But it is not really that hard to get one working.
What you need to do is to go into your Model settings page, create a new curve, if you are ok with the default linear curve, then you need to just create a simple 4 point curve. The middle points(point 2 and point 3) X coordinates will be the one that determine the starting point of the gimbal and the area between the 2 points will be your deadzone.
Once you are done, just apply your new curve into the inputs.