Hi h_h_82, and welcome.
The first question I have to ask is whether the ABS on your bike is actually functioning as it should. From your first post it would appear that it is non-functional, thus the purchase of the GS911. If it is non-functional, it is possible that the controller has burned out, in which case you will not be able to connect to it.
The idle switch is a bit of a catch 22. For it to be adjusted, the switch needs to be on. However, when it is out of adjustment, the switch is off. I will be doing a short "How To" to show to set up the throttle body and switch in the near future. In the meantime, just follow these steps.
Back out the butterfly stop screw on the LHS TB until the butterfly is completely closed and the butterfly stop is not in contact with the screw.
Connect a multimeter to pins 1 and 4 of the TPS
Adjust TPS to give 0.25V on the MM and tighten the screws, ensuring that you maintain the 0.25V.
Now turn the butterfly stop screw in until you achieve 0.36V on the MM.
Lock the butterfly stop screw.
If you now hook up the GS911 you will see that the idle switch is on and the switch is correctly adjusted.