In my short time in Texas I only saw one place that prohibited guns( besides the National Parks buildings)Here in Texas it is easy to obtain a ccw but the restrictions on where you can carry are crazy. Anytime I go into town I just leave my gun at home because I have gotten out of my car, maybe had to walk a block or two and than find out where I am trying to go has a restriction against carrying.
Don't know about TX laws but in FL if you possess a gun in a place that display"no guns" the only thing they or cops could do is to ask you to leave the premises. In all my 4 years since I carry a gun here I yet have to see such a place. One has to remember the key word for carrying a gun in a place the prohibits it: " knowingly".
I don't know anything and I forget almost everything