Why doesn't the Rotate3D command work in Bongo?
Bongo is not able to use native Rhino commands (includes Gumball) to add rotation data because Bongo needs a pivot and Rhino doesn't know anything about pivots.
You can use the BongoRotate command instead, and move the pivot to the center of the rotation.
Getting the pivot in the right place can be done by the following commands:
BongoMovePivot - to move the pivot where you want the rotation to happen from. In the command you have a 3point option, if you want to change the direction of the pivot's x,y and z -axis this option allows you to do so.
BongoOrientPivot - another way to change the direction of the pivot's x,y and z -axis.