The top picks out of lane to counter Gangplank include Kog'Maw, Vayne, and Lucian. These are all great at countering Gangplank with decent win rates over 61%. Even if these Gangplank counter picks are not picked in the same position as you, it's not a good idea to play him into these matchups. They will very likely beat Gangplank.
Conversely, if the opposite team brings either Ivern or Ryze, Gangplank mains should strongly consider picking him, as he easily destroys these selections with win rates over 53% against each ofthem.
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