Single Elimination GPTS
Paperwork sen to TOs (the fact sheets) define the policies for things like GPTs, PPTQs, etc.
What's done at a GP isn't covered by the same policies; don't use GP “grinders” as precedent for store-level events.
I've not seen a GPT fact sheet for a while (I don't own a store, so I normally don't need to know), so I can't provide an ‘O’fficial answer - except to say “always comply with the fact sheet”. (If someone who is a store TO has the link to the most recent fact sheet, that could be useful.)
d:^D