G-Max Stonesurge (Japanese: キョダイガンジン Kyodai Rock Formation) is a damage-dealing Water-type G-Max Move introduced in Generation VIII. It is the exclusive G-Max Move of Gigantamax Drednaw.
G-Max Stonesurge inflicts damage and creates Stealth Rock on the target's side of the field. Its power and whether it is a special or physical move depends on the move it is based on.
Gigantamax Drednaw can use G-Max Stonesurge if it knows a damaging Water-type move.