User blog comment:WildBrick142/GTA V Cover is here!/@comment-3254365-20130405085547/@comment-26435037-20130405120249

Yes. GTA4 and GTA5 occur in the same universe. The real-life SWAT that appeared in the GTA3 games was replaced by NOOSE. Same with FBI (which was renamed FIB) and recently, the CIA (renamed IAA).