You can store gasoline in approved canisters if you need to store gasoline for your lawn mower or other type of small engine. Gas cans purchased from a gasoline retailer are approved by state and local government regulations. Once you have bought the appropriate gas can and have filled it you can store it safely in your garage. Since many garages are directly connected to homes it's important to take all precautions to prevent any spilling accidents from occurring or any other type of accident due to improper storage of the gasoline can.
Purchase an appropriate gas container that include vents, a safety lock feature and a lid that screws on tight. The container should include an approved label by state and federal regulations. You can find such gas canisters at your local home improvement store.
Store your gas can in your garage in an area that is at least 50 feet away from any flame source. Read the label on any chemicals close by to know whether or not it's safe for your canister to be by those chemicals.
Check that your garage is at room temperature and no warmer than 80 degrees. Keep the gas can placed in an area where there is no direct sunlight or heat sources near by, such as a furnace or space heater.
Keep the can on a flat surface and in an area where it cannot be easily knocked over. Also, when you've secured the gas can in an area in your garage you should check that the can is not too full and that the gas cap is screwed on tightly.
Keep materials to clean up a possible spill near by the gas can so that it can be cleaned quickly. A gas spill can be picked up with paper, rags, cat liter or sawdust. Dispose of any waste spill material at a hazardous waste facility, and never place them in garbage bags.