Opened in 1980
Wikipedia and related historical summaries place Bonanza's opening in 1980, after the site and shopping-center corner had already carried several smaller casino and retail identities.
A claim built for the roadside
The World's Largest Gift Shop language is not subtle, and that is the point. In Las Vegas, the sign functions as attraction, advertisement, route marker, and cultural shorthand.
Still useful today
The store remains useful because it compresses a large souvenir hunt into one indoor stop near Sahara Avenue, The STRAT, transit, and the north Strip resort corridor.
Image: Wikimedia Commons contributors