G-Max Move, deals damage and has a 50% chance to make the target drowsy.

G-Max Snooze deals damage and has a 50% chance of making the target drowsy, causing it to fall asleep on the next turn.
The target will not become drowsy if it switches out or is already affected by a major status condition.
Pokémon with the ability Insomnia, Vital Spirit, Shields Down (with the shield active), or Comatose are immune to sleep.
G-Max Snooze is not affected by Serene Grace or Sheer Force.
G-Max Snooze is the Dark-type G-Max Move of Gigantamax Grimmsnarl
Its power and category depend on the base move the user had before Gigantamaxing:

Move	Power	Category	Learnable
Assurance	110	Physical
Beat Up	100	Physical
Bite	110	Physical
Brutal Swing	110	Physical
Crunch	130	Physical
Dark Pulse	130	Special
Darkest Lariat	130	Physical
False Surrender	130	Physical
Fiery Wrath	90	Special
Fling	100	Physical
Foul Play	130	Physical
Hyperspace Fury	130	Physical
Jaw Lock	130	Physical
Knock Off	120	Physical
Lash Out	130	Physical
Night Daze	130	Special
Night Slash	120	Physical
Payback	100	Physical
Power Trip	130	Physical
Snarl	110	Special
Sucker Punch	120	Physical
Thief	110	Physical
Throat Chop	130	Physical
Wicked Blow	130	Physical