It had lots to do with GME in that GME was the source of the risk (because of its through the roof volatility) that the DTCC was protecting against. But if your implication is that the DTCC has a dog in that fight you are way off base - they exist several layers below hedge funds in the trading stack and have nothing to do with each other, in fact I'd be willing to bet Gabe Plotkin couldn't even tell you what DTCC stands for.