Weak toFlyingGhostFireIceDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	31.1
Reshiram	DragonFire	Fire FangFusion FlareLegacy	25.8
Salamence	DragonFlying	Fire FangFly	23.8
Yveltal	DarkFlying	SnarlOblivion WingLegacy	23.7
Chandelure	GhostFire	Fire SpinOverheat	23.6
Honchkrow	DarkFlying	SnarlBrave Bird	23.4
Moltres	FireFlying	Fire SpinFly	23.4
Enamorus	FairyFlying	AstonishFly	23.4
Cinderace	Fire	Fire SpinPyroball	23.3
Volcarona	BugFire	Fire SpinOverheat	23.1
Darmanitan	Fire	Fire FangOverheat	23.0
Chien-Pao	DarkIce	SnarlBlizzard	22.7

Clear boosts the Fire attacks above. Clear and Fog boost Gourgeist.

Level 40, 15 attack IV, costed against Gourgeist's own defense and typing, one per evolution family.

Gourgeist's moveset, CP and shiny All counters Raid board

Questions people ask

What is Gourgeist weak to in Pokémon GO?

Gourgeist takes 1.6 times from Flying, Ghost, Fire, Ice and Dark.

What's the best counter to Gourgeist?

Blacephalon with Incinerate and Mind Blown, worth 31.1 damage per second against Gourgeist's own defense. The full ranking is above.