GVP was founded in 1987 and dedicated to Amiga hardware production, so all hardware produced by GVP (mainly processor accelerators and HD controllers) was solely for Amiga computers.

GVP was always amongst the technology leaders and came up with unique products like the high-end graphics card EGS 110/24; they were also for example among the first to come up with a HD controller with autoboot capability.

Great Valley Products was basically doing only hardware design - the software development was mainly done by a small group of freelance programmers (e.g. Ralph Babel), and the manufacturing of the expansion cards was outsourced to 3rd party companies. The latter fact allowed GVP to participate from the most sophisticated production methods without having to upgrade an own production line. By 1990, GVP had 22 employees.

GVP announced in 1993 the Z-III SCSI controller A4098 to be the successor of the A4008, but that expansion never appeared, as in 1994, the company assets and product lines were auctioned off to Power Computing and M-Tec in a 50/50 split. The new company, which operated under the name GVP-M, was formed with a completely new staff, as the deal did not include the personnel of the old company. Production of some of the GVP products was restarted at this time, and those are still sold (no new expansions were developed, though).

Some staff members had already been involved in the development of Amiga hardware: The President of GVP, Gerard Bucas, was for four years Vice President in the technical division of Commodore. Jeff Boyer and Scott Hood were also formerly working for Commodore and in charge of the development of e.g. A2052, A2058, A2091 and A590 (Boyer) respective A2320, Amber Chip (Hood). Boyer changed to GVP in 1989, Hood was employed some years later in that company.