Please do not listen to these people. It annoys me to death reading some peoples suggestions when they don't know JACK. Seafoam is a waste of money on ANY modern day car. It is not needed whatsoever. Period.
And no, you do not need to run a fuel injector cleaner. What you do is start your car, and drive it casually and not rev the engine too high, until you get fresh gas in the tank. You never mentioned if it was near empty or near full. If it's full, drive it. It won't hurt a thing. I just wouldn't drive it hard. And if it's near empty, fill it and carry on as usual.
The fuel won't be shot, it will still burn. If it was in a climate-controlled environment for the season, there won't be any moisture in the tank, so there's nothing to worry about. Nobody uses fuel injector cleaner anymore unless the car is driven like a slug for 15 years and then you got your hands on it and it runs like a turd.
It is better to remain silent and be thought of a fool, than to open your mouth and remove all doubt.