when i use my rocktron all access i have to use the midi out on the pedal to the midi in on the unit im controling.also im pretty sure the GCPro is made to be set up with the GCX and has a 5 pin midi that powers the GCPro from that(5 pin not 7pin)maybe that has somthing to do with it. but that kind of unit should be able to control anything.im using a lexicon R1 and its *** cause it is specific to the G2 unit but it has a relay to change channals hope you work it out dude.DB
