I wouldn't store it in the shop. Gas fumes have tendency to settle, but build up to something like 18" above contained ground level, well above pilot light level. A fella nearby some years ago brought a gas can into his home and was cleaning something with gasoline well away from the furnace and water heaters, but the fumes settled to 18" above the floor, worked their way to that area and ignited. He lived, but the explosion burned him and his house real bad. 55 gallon drums with fuel for ag use do well outside, especially elevated so that gravity does the work through the nozzle, no pumping or any of that.
In any event, be careful, use it in good health. Time it as best you can when prices are down. A couple of years ago after it got well over $4.00 and then dipped into like $2.80 or so, I honestly contemplated buying in bulk for a few hundred gallons, but convinced myself that it would go below that. If I only knew than what I know now. $2.80 versus $4.00? Wish I had that back.