No, I don't see a way they could.
They can take assets involved in crimes. Going to an illegal party is a crime, and your car can get impounded if you do it, and it's fair to be charged to get it back. It costs money to tow and store a car. Drug dealer money isn't really useful when they're in prison, and I'm all for the police using it. Beats them spending my money.
But a legally carried gun, no. I don't think anyone here has ever had to pay to get a gun back after police abusively take them. You could say theszerdi did since he had to go through a court battle, but there was no official gun return charge.
I don't think it's realistically a problem. Among other things, preemption would seem to have a lot to say about that.If it ever comes up, it will be an extremely strong case for a law suit.