The Drag[en]gine Game Engine source code is available under the L-GPL or GPL license as you desire. Due to the GLEM System game projects do not link directly to the game engine and thus do not take over this license. Hence the following licensing situation is present:

• Game Engine: L-GPL or GPL
• Modules: L-GPL, GPL or compatible to them
• Launcher: L-GPL, GPL or compatible to them
• Games: any license you see fit.

Drag[en]gine API Documentation