It is inaccessible for the player. The brand is featured in the Leopolds store, also located in Rockford Hills.
It is based on the Italian luxury fashion house Ermenegildo Zegna.
Guido is a derogatory term for Italians so the name is also could be a pun of guidos en Italia, roughly translated into "Guidos in Italy".
It could also be a vulgar spoonerism, resulting in "Zuido Genitalia", referencing genitals.
Its store is based on a building at 301 North Rodeo Drive that had an Ermenegildo Zegna store at the time the game was being developed but it was demolished in 2012  and replaced by a new building occupied by Burberry.