gp4 - OpenGL profiles for NVIDIA GeForce 8/9/100/200/300 Series, OpenGL 3.x Quadro gp4 gp4 corresponds not to a single profile but to a family of profiles that include gp4vp, gp4gp and gp4fp. Since most of the functionality exposed in these profiles is almost identical and defined by NV_gpu_program4 these profiles are named the gp4 profiles. For more details refer to each profile documentation.

OpenGL Extension Specifications
http://www.opengl.org/registry/specs/NV/gpu_program4.txt gp4vp, gp4gp, gp4fp