It is based on the Fantom-X series, having a vintage design that resembles the first Juno synthesizers, such as the Juno-106.

The Juno-G's main competitors in the approximate price range, with similar features, when first released, were the Korg Triton Le/TR and Yamaha MO6 workstation synthesizers.

Despite the similar name and later introduction, the Juno-G was not set to replace the popular Juno-D synthesizer: for they both ran concurrently.

It was Windows and Mac compatible,[clarification needed] connecting through USB for MIDI and data transfer.

Version 2 of the keyboard's operating system is available as a free download, which allows user-sampling, waveform editing, and sample triggering.