From MultimediaWiki

Graphical System for Presentation (GRASP) Library

• File extension: .gl

GRASP Library (GL) is an animation file format that played back in MS-DOS using the GRASP Runtime (GRASPRT.EXE).

External Links

• http://en.wikipedia.org/wiki/GRASP_(multimedia_authoring_software)
• http://en.wikipedia.org/wiki/GRASP_GL_library_format