Build and Runes
Avoid using suppression/stun ultimates on Gangplank because he can cure out of it by using his W(note: Urgot’s ult will still cause them to switch places).
Gangplank has good wave-clearing abilities, so picking a champion with light wave clear will do great against him.
Don’t clump together crowd control on Gangplank. His W removes all crowd control effects on him at once. Wait until he removes scurvy, then hit hit with hard cc to lock him down.