In the initial post of this thread Mark reports:
"The FBI has received information indicating 'armed protests' are being planned at all 50 state capitols and the US Capitol in Washington, DC in the days leading up to President-elect Joe Biden's inauguration on January 20, according to an internal bulletin obtained by CNN.
I agree with Megan McCain. It is time to round these folks up and send them to Gitmo."
Before sending the protestors to Guantanamo, poor old DonDiego suggests one consult applicable laws to the carrying of guns at protests.
And as it turns out there are laws in each State and the District of Columbia pertaining to this issue: "Where local officials can/cannot ban guns at demonstrations"
Ref: Where Local Officials Can't Ban Guns at Protests
As it turns out the District of Columbia is a jurisdiction that does not "allow firearms at demonstrations".
However, 36 States do allow concealed or open carry at demonstrations.
Oh, . . . and at least up until now, no Guantanamo residents are American citizens. Perhaps that condition should persist. [Actually one US citizen was detained in Guantanamo, before it became known he'd been born on US soil.]