In theory this is a nice idea, but you have 25 virtual instruments and 6500+ presets with varying controller assignments in AnalogLab 4, plus you can use the single VSTi and they report their parameter feedback and preset names to the KeyLab too.
This is an incredible amount of work that I would have to do in GP.
And it has already been done by Arturia, GP just has to let the communication pass through.
BTW in 3.6 the knobs and faders don´t work anymore to control the parameters of AnalogLab.
I can browse through the presets with the jog wheel and the arrow keys, but the MIDI control is broken.