I have created a new version of my original example of how to recreate the approach used to play Won’t Get Fooled Again by The Who.
This version uses the hammond organ and ARP 2600 included in the Arturia Modeling Collection.
The main difference is that the VCA is no longer being triggered by a square wave generated by VCO1.
Instead, it is being modulated by a square wave generated by a separate LFO whose tempo can be synced to Gig Performer’s playhead. This allows you to (a) set the desired tempo by adjusting Gig Performer’s BPM and (b) turn on the metronome to produce a click that plays at the same speed - suitable for drummers.
I’ll answer questions as time permits but you should consider this to officially be completely unsupported
Soundwise, it is not identical in tone or such things as filter cutoff values etc., because I don’t have the original handy and frankly I’m not that interested in trying to reproduce the exact tones.
Feel free to tweak it and don’t tell me that this isn’t exactly how Pete did it because I don’t care 
This Gig File was created with Gig Performer 5.1.1 - it should work in earlier versions of GP5 as well as GP4 but I didn’t (and won’t) test those earlier versions.
Wont Get Fooled Again.gig (151.8 KB)