Supreme court said this was illegal, moreover this would mean you have to be allowed to keep guns in cars as to not break the law. But storage of firearms in vehicles is prohibited...
The ability to keep guns on private property is different by state. In most, the landlord has the final say. If your landlord puts a "no firearms on the premises" clause in your rental lease agreement, you can be evicted for breaking the rules.
Most civil rights are protected against government violations, not private entities. No different than if your employer says "No guns at work."
Where you keep your guns after being informed of the rules is up to you & the law -- storage facility, relative's home, etc -- but what the courts have ruled on is, if your employer has a "No Guns" policy at work, they can't prohibit you from storing a gun in your car in their parking lot. That would effectively disarm you while commuting both ways, which they don't have a right to do, assuming you're allowed to legally own and carry while driving to work. Unless they operate an armory and accept the responsibility of checking in, securing and returning your firearm as you enter and leave work, they can't stop you from being armed while commuting.
Private rental properties have no such restrictions.
My concern would be, if you live in an apartment/rental home, why are you allowing anyone outside your inner circle to know you have guns? If you fly under the radar, nobody will know enough to complain about you -- just like concealed carry should be ..... concealed. Sure, they can try to evict you, but if you have a lease, that takes time. If you're on month-to-month, better keep your bags packed and your possessions easy to move!

If you believe the Supreme Court gave an opinion that contradicts this information, please post the case and relevant quotes.
