TexasCHLforum.com

I'm with TAM. If you knowingly enter a business that posts effective notice, you have waived your right to sue for liability. All the defense attorney has to do is ask you on the stand, Did you see the sign? Yes. Did you then disarm? Yes, I was required to be law. Did you then enter the business knowing that were not armed? Yes, but I....case dismissed.

You'd have a better chance of suing a place that was a GFZ but was not posted (think schools, etc.), but then you're suing the government, and good luck winning that one.