I worked for Syntrex 1988-1989 in the Dallas, TX sales office.
This was back when we wore a suit/tie all day. The company actually gave us a "clothing allowance" each year to buy suits.
All of our clients were law firms in the Dallas area with most being in downtown. Very fancy old school offices at these law firms.
I worked mainly on Banyan Vines and Novell Netware, and doing migrations from Syntrex or WANG to WordPerfect.
I remember the older Syntrex systems and they were proprietary word processing systems and compete against WANG word processing systems.
I believe they were UNIX based at the core and I remember that the Gemini system was fully redundant. Each system was connect to each other via Thick Ethernet.
I do have a friend who I worked with that was a specialist on those system (Karl Houston). He would much more details.