Gatland was unhappy following Saturday's 30-15 loss in Auckland, concerned over the treatment of Lions scrum-half Murray against the world champions.
The Lions head coach felt Murray was unfairly targeted at Eden Park as he expressed his concerns to the match officials, and Hansen returned fire on Monday, making for a fierce clash in Wellington on Saturday.
"It's predictable comments from Gatland, isn't it? Two weeks ago we cheated in the scrums and last week it was blocking and now he's saying this," Hansen told Radio Sport.