Same question from me, arriving from the US and connecting to GVA today, after taking the Heidi train, I only saw 2 choices: exit Zurich and gates A/B/D. Chose the latter, and ended up at a security checkpoint. Right afterwards, there was an escalator and elevators for the A gates, which took you to passport control.

Did I somehow miss an earlier turnoff for the A gates, before the transit security checkpoint? There was no priority lane at the transit security checkpoint, so exit Zurich might actually be a better option at peak times...