What's the story? It's a government-owned building, aka public building. Do they have NRS 202.3673 signs at each public entrance prohibiting concealed firearms? Only on the front doors? Know of any alternate public entrance that's unsigned?

I generally avoid government-owned buildings unless my presence is compelled by the threat of violence. I have to go for a work function, three hours of a dog and pony show and then optional bowling afterward. My employer prohibits weapons on its premises, but these aren't its premises. Open carry is probably a career limiting move.