Since I am interested in this question, I contacted my WoH Concierge.
Guest of Honor bookings while being a Glob will retain Glob status even if you failed to requalify. The reservation is still honored as a GoH booking.
I wonder if this is true policy or just a best guess.
Why I ask is on 2/28/23 someone could book 10 reservations throughout 2023 and into 2024 as GOH reservations thus getting many many Elite benefits they are no longer entitled to which wouldn’t make sense.