WotC has released the Game System License and System Reference Document for D&D 4E. The documents (and any future revisions) can be found (and downloaded) in the Dungeons & Dragons 4th Edition Game System License website.
Here’s a “layman’s version” from ENWorld. There’s also an “unofficial GSL FAQ” in ENWorld, but it’s tough to link to (it was post on June19, 2008).
Source: GamingReport.com





