You Tool is a retail, home improvement, and hardware store featured in Grand Theft Auto V.
There is a You Tool store in the Grand Senora Desert, Blaine County, though it is inaccessible. The store is also advertised on the radio.
Trivia
The orange signage and shopping carts are likely a references to The Home Depot, while the dark blue building and the arched shape of the store front is likely a reference to Lowe's, two competing big-box hardware stores in the U.S.
The name is a reference to the insults; "you tool", a tool being a person who lacks the mental capacity to know he is being used; and 'you fool'.
"You Tool" could also be a reference to YouTube, a popular video sharing website