My first instinct is that sovereign immunity applies. GPL is a license designed to protect the copyrights of the creator or copyright owner, but copyright itsel

My first instinct is that sovereign immunity applies. GPL is a license designed to protect the copyrights of the creator or copyright owner, but copyright itself is a privilege granted by the Federal government and protected by law. So if you sued them for violating the GPL, I’m fairly certain they could just claim sovereign immunity in court.