If the government decides to force the Church to participate or me to enter one myself, then yes, I might engage in civil disobedience but I doubt it will come to that in my lifetime.
The government forcing you to get gay married......I don't see how that would ever be possible. I don't even get how you came up with that. Lots of people, including people like me who are 110% for gay marriage, would have a huge problem with that. I dunno, it's just too silly to respond to....
On the other hand I can see a situation where a church is forced to wed a gay couple, but I'm thinking that is unconstitutional. Regardless, I would be against that. Just like I would be against forcing any church to wed a mixed race couple.