Walt,
This is according to their publication, the GS-Xtra. The video has a "shootout" between a stage one and a hemi, filmed in 1984.
It has a Channel 2 news segment, where the TV crew is in the ASC facility filming the production line of the GNX, and some interviews.
It has a GNX vs. Calloway Corvette from 1987. This is filmed at a drag strip in which the GNX beats the twin-turbo Vette.
July 1993 Hemi vs. Stage one, round 3.
GN TV commercials.
A 1970 GS 455 vs. a 68 Hemi Roadrunner street race.
1989 coverage of the first NMCA race featuring both GS's and Turbo Regals.
A "My classic car" feature of John Chamberlains 1970 Stage one.
A historical segment about the GS, narrated by Paul Zazarine and Tom Shaw. It has each of the GS models from each year along with narrative and examples.
And, according to the GS-Xtra, much more. I have never seen any of this but was told that the picture probably won't be perfect due to the age of the filming equipment, etc. It says that the video was 3 years in the making.