You should be able to use any MIDI controller if you have a compatible MIDI interface, however you are confusing two concepts ... MIDI Audio.
When you ask how to get the sounds from your controller into GB, the simple fact is you cannot. MIDI does not transmit sound it transmits instructions that tells a Synth (GB) what note to play, how long to play it, etc.
You have to create a "Software" track in GB, and then you can play that instrument with your controller (in this case one would assume you'd create a "Software" drum track to control with your drum machine).
Does that clear things up any? --HangTime [Will Compute for Food] B-|>