To get the most out of Rogues Gallery, you'll need the Cold Steel Wardens corebook, which is currently available through both Studio 2 Publishing and DriveThruRPG (pdf).
However, the setting material found in Rogues Gallery can be used with pretty much any roleplaying game with an Iron Age or investigative feel.
Short answer? No.
Long answer? The MAFIANAP Mechanics used in CSW were tailor-made to provide an experience that emulates the Iron Age of comics. While there are a ton of great systems out there for superheroes, system conversions take a great deal of time and effort and tend to dilute focus from the default CSW experience. While you're obviously welcome to run your own games in whichever system you prefer, all materials for CSW will utilize the MAFIANAP Mechanics rule-set.
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