First off...don't tell them you have a gun in your car. I can't think of any legal means for them to look in your car or tell you your not allowed to have one in it on their property. I work for a public employer and I haven't even heard this one but I'm in Ohio. Be sure to post what you find out...may be interesting.
NRA Life Member
Teach a child to shoot, it may save a life someday!