MGM Resorts officially names Lady Gaga among Grand Garden Arena's star performers; the Recording Academy fixes the 2022 Grammys at that venue, and ABC and The Boston Globe document her April 3 performance there. This verifies an event, not a stay.
Lady Gaga performed at MGM Grand Garden Arena during the 64th Grammy Awards in Las Vegas on April 3, 2022. The Recording Academy identifies the arena and date of the ceremony, while ABC and The Boston Globe document Gaga performing onstage at the exact venue. MGM Resorts' own venue guide also names Lady Gaga among the arena's past star performers.
Source conclusion:
The cited sources confirm attendance at an event at the hotel, but not an overnight stay.
