State Property parking lot

[JB3RN]

I am a registered nurse and a state employee. I work at a public health department with the "no guns" sign posted on the building. My supervisor says this extends to the parking lot. I am a VFW life member, an NRA endowment member, and a HCP holder. I can't find Tennessee code that verifies or contradicts this. I didn't bring this up but my VFW and NRA stickers on my truck gave me away. Guess I should drive a prius covered with Obama and Greenpeace stickers and it wouldn't be an issue. Any guidance or direction would be appreciated.