Keith Gill, the trader known for the GameStop short-squeeze, is facing a class-action lawsuit over alleged securities fraud. The complaint accuses Gill of orchestrating a "pump and dump" scheme through social media posts that led to violent price fluctuations of GameStop stocks between May and June. However, a former federal prosecutor believes the lawsuit is likely to fail. Gill, who emerged from a two-year social media hiatus in May, saw his posts spark a 180% surge in GameStop shares. The lawsuit alleges that Gill did not adequately disclose his intent to sell his options, misleading his followers and causing losses for some investors.