Gabbard has probably less than a 10% chance of becoming a VP, unless Yang wins. Then it soars to about an 80% chance suddenly. I can't even imagine who would be Yang's second choice after her.
Out of interest, why do you think Gabbard would be so high on Yang's VP list?
Surely, if Yang (somehow) won the nomination, he'd want to do something similar to other presidents with little political experience, (think Eisenhower, Trump) and pick a skilled political operator, like a high profile Senator, or successful Governor?
I'd think he'd be more attracted to a Senator like Michael Bennet, Brian Schatz, or Amy Klobachar, or a Governor like Steve Bullock, or Roy Cooper.