If you're considering storing your gun safe in an unheated garage, there are a few things you need to take into account. First, the temperature in an unheated garage can fluctuate significantly, which can cause condensation to form inside the safe. This condensation can potentially damage your firearms or ammunition. Second, if the garage is attached to your house, the cold temperatures could potentially freeze and damage the pipes leading into and out of the garage. Finally, thieves are more likely to target gun safes that are stored in unsecured locations like garages. If you do decide to store your gun safe in an unheated garage, be sure to put it on a concrete floor to prevent moisture damage and keep it away from any potential freezing hazards.