I assume this is a recent change, but UA's website has been updated with updated priority list. GS now officially listed above everyone else, so I am to assume it's publicly available now GS in Y > 1K in PP.
Waitlist priority for all flights
- United Global Services® requests
- PlusPoints upgrades and MileagePlus Upgrade Awards
- Premier status of the traveler*
- Fare class
- Chase United MileagePlus Club cardholders and Presidential Plus cardholders
- United Corporate Preferred participants
- United Chase Cardmembers with $25,000 in annual spending
- Date and time of request
https://www.united.com/ual/en/us/fly...yW3fRnyEdRok6s