The SEC does have the
Trading Halt card to play, which suspends trading in any stock for up to ten business days, and there is a very good chance that they would play this card for the GME stock soon IMO, and possibly some of the other meme stocks as well. Considering the fact that the SEC technically doesn't have to forewarn investors that it going to suspend trading of a stock and that they have already released a
public statement that they are aware of the ongoing market volatility in the options and equities markets.
DISCLAMER: NOT A FINACIAL EXPERT, THIS IS MY PERSONAL OPINOIN ON THE MATTER SO TAKE THIS INFO WITH A GRAIN OF SALT.