Forest were furious after Jakub Moder escaped a red card for a nasty challenge on Neco Williams.
Gibbs-White said: "It is being laughed at. Frankly, ridiculous. The amount of rulings that have gone against us this season is outrageous.
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"I don't want to talk too much about it because I could get into trouble, but it's a lot of rulings, and in two days we'll get an apology.
"It's very disappointing, but we seem to say the same things every week. The fans deserve more and so does the manager."