A module in between Host-gate and midi CV, with 3 gate outputs and midi note range settings for each of them wouldn’t be great ?
And you’ll have a beta tester ! 
I’m not clear what it is you are looking for. Would something like my VCV Library - Chinenual DrumMap help?
for exemple, the gate output 1 could be set to react to c1-b1 for a bass soûd, the 2 to c2-c5 and rhe 3 to c3-v5 for a partial oberlap.