The GL library format is a self contained animation library used by the GRASP GRaphical System for Presentation, to store scripts, pictures, and all the commands needed for a GRASP animation.
GRASP was the first multimedia animation program for the IBM PC "Family of Computers". John Bridges is the principal author and Copyright holder of GRASP, which was released in 1985 and originally distributed as ShareWare directly by Microtex Industries.