Look up "warrant canary". IANAL, but my understanding is that you can be secretly compelled to not speak, but you cannot be legally compelled to actively tell

Look up "warrant canary". IANAL, but my understanding is that you can be secretly compelled to not speak, but you cannot be legally compelled to actively tell a lie -- the Wikipedia page agrees with my interpretation. So, you can just publish "I am not subject to a gag order" every day until you are subject to one.