[redheadtoo]

... which prohibits guns in our cars parked in a multi-tenant parking garage.

The rule is probably part of their lease agreement. They may have no choice.

[BearCub]

The rule is probably part of their lease agreement. They may have no choice.

No, it's not. The building is fine with people having guns in their cars (I asked the building manager).

My employer is preventing me from carrying a gun in my car in a parking lot not owned or controlled by them. It a load of crap.