Question

I want to be able to add a staff to a score that uses standard ukulele tuning gCEA using a low g. I would like to have the ukulele staff displayed as tablature beneath a regular voice or piano treble staff

Answer 1

The ukulele that is in the Notion for iOS app will allow you to do alternate tunings.  Simply go into Score Setup, tap the arrow to the right of the instrument, and tap "tab tuning."  Here you can change the tuning to the low G tuning of GCEA.  You can have the tab below the standard notation and the tab numbers will reflect the GCEA tuning.  The playback of the instrument will not go below C4 though.