No, the Continental congress had to make law regarding what is a legitimate marriage, just as the government always does.
They would not have counted a gay marriage as legal.
The Continental Congress had no such authority. The Articles of Confederation conferred no such authority. The Constitution confers no such authority.
If you have such a law, post it. Make like we're from Missouri. "Show me".
History argues against that. Marriage has always been a State issue, not a National Government issue.
The Continental Congress passed matrimonial legislation? I have no doubt that they would have found gay “marriage” to be abhorrent, but you are stating the factual point that the Continental Congress passed laws regarding marriage. Prove it.