Rick Granberg said
Is there any way that I can use my Toontrack MIDI files on my iPad Pro with an iOS drummer app?
Sure.
While there may be some ToonTrack-specific elements in any groove,
the MIDI is generally mapped to conform to most virtual drum instruments.
Rick Granberg said
I'm not even sure how I would get the MIDI files into the iPad Pro. Anyone know about this?
This will be your bigger issue & AFAIK will depend entirely upon the app itself.