Error starting gmoccapy with spindle speed display.

This will display the current speed as a bar indicator and the spindle-at-speed signal as a red/green indicator to the right of it.
Example form the docs (speed 0 and spindle-at-speed True):

 

Glad you got it working.
I'm not really familiar with stepconf wizard but it may just simply have been overlooked when gmoccapy was added. Those wizards are very handy to get a simple working config but it's pretty much impossible to keep them up to date with the latest developments.
There usually needs to be some manual tweaking in the hal and ini files.