I saw this somewhere but it is not true! "Notion iOS Release Notes When importing/exporting drum parts via MIDI, now maps to standard GM drum mapping "
MacBook Pro 15 in. OSX El Capitan Ver 10.11.6 Notion 5 Logic 9 other DAW's as well.
Notion for IOS still uses highly non-standard Midi numbers for importing or exporting drums. I am using the most current Notion and Cubasis and the problem is still unsolved - perhaps unsolvable, perhaps buried in the basement code created by the original owners....