Jonny Tung is a shoe store in Grand Theft Auto V.
Billboards can be seen advertising their goods. The brand is also sold in the Leopolds store, also located in Rockford Hills.
A coffee table book can also be found in some interiors.
The old store occupied the ground floor of a 10 story building on the corner of South Boulevard Del Perro and Dorset Drive in Rockford Hills. A billboard stretches the top 8 floors. There is a "For Lease" sign on the window and the interior (visible at night) would indicate the shoe retail business no longer operates from the premises.
Jonny Tung seems likely to be a play on Jimmy Choo.
The old store location is based on 9737-9777 Wilshire Boulevard, while the new location is based on 210 North Rodeo Drive (Tiffany & Co). The real Rodeo Drive Jimmy Choo store is also replicated in game, as the Caca store on Portola Drive.