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GCS was founded in 1979 as a programming company. Early customers included insurance companies, a retail store, a cable television company, and a computer service bureau specializing in financial service firms. In 1981 GCS contracted with Cinfed credit union of Cincinnati to write and install a credit union data processing system to support their then 12,000 members. In 1983 GCS wrote a credit union system to run on a PC network and sold that system to credit unions throughout Ohio and Western Pennsylvania. Because of the progressive credit unions who use the GCS credit union system, GCS has been at the forefront of new technological innovation. Below are the dates of a few significant enhancements to the system: 1985 - First Real Time ATM Authorization System 1990 - First Interactive Voice Response System 1999 - First Cash Dispenser Interface 2000 - Internet Banking 2000 - First Web Interface to Corporate One for Check Images 2000 - First Shared Branching Interface 2003 - Electronic Statements on the Internet Trough the years GCS has interfaced to most of the major vendors serving credit unions. Below is a sampling of these companies: ATM Online Jeanie (5/3) Elan ATM Batch Corporate One Illinois League Certigy

Gunther Computer Systems Questions

The Gunther Computer Systems annual revenue was $3.2 million in 2026.

Gunther Computer Systems is based in Columbus, Ohio.

The NAICS codes for Gunther Computer Systems are [51, 518].

The SIC codes for Gunther Computer Systems are [73, 737].

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