Rockstar's official description of Sam Odessa mentions California rather than Grand Theft Auto V's fictional State of San Andreas.
Rockstar's official description of D.S. MacKenna mentions both their fictional State of New Austin and the real-life Hollywood instead of the in-universe Vinewood.
Similar to the Grand Theft Auto series, Red Dead Redemption is an open-world action-adventure game series set in a satirical version of the United States during specific historical periods—Redemption, in particular, takes place during the final days of the Old West between 1898 and 1914.
Both the Redemption and HD Universe parody real-life brands and locations. However, unlike the GTA series, the brands in the Red Dead Redemption universe avoid names based on dark humor or sexual innuendo.