1978 GJS

GJS stands for George, Jeff & Scott Utterback.   Jeff Utterback is an "Old School" Pro who also raced for SE Racing and was responsible for designing the PK Ripper frame which was originally known as the JU-6.
That takes care of the "J" in GJS now for the "G" and "S"...
The "G" represents George Utterback who was Jeff's father and the "S" belongs to Scott which would be Jeff's brother.

I always wanted one of these back then but soon got over my drooling when I bought my SE Racing Quad Angle.