General midi has the pedal hat at 44, G#1. You can put the pedal hats there, or if you want to match another drum pattern program, you can change the pedal hat midi assignment in an existing drum kit to the location that you need. I have seen, for example, that built-in Logic Pro X drum kits have a “pedal hat” or “foot hat” mapped below 36, at 32 or 33, if I recall correctly.