At 26:15 in this video it says Jimmy Page used this controller in conjunction with the Roland GR-500 guitar synthesizer, which he purchased in Los Angeles in 1977.

used in the "burning in the skies" music vid.

Listed on Reverb.com in November 2020.

This Roland GS-500 Guitar Synthesizer Controller is owned by Junkie XL

Serial: L771027 Light scuffs and scratches.A few dents with finishing missing. The roland logo on the back of 3 tuning pegs is missing.

All items in The Official Junkie XL Reverb Shop ship fully insured with delivery confirmation. COA's were limited to the first 500 orders so unfortunately we do not have anymore.

“The GR-500 is the analog synth part, used with the GS-500 guitar-shaped controller, and mine also came with a foot controller. It could function as a guitar on its own, but the controller also had a bass section where each of the six strings could be assigned individually, for example, making the 5th and 6th strings bass and the others guitar.

You could also apply percussion, attack, decay, and envelope generators, which let it produce a funky auto-wah bass. There were also poly ensemble and solo melody sections for the main synth sounds. The tone itself was fat and heavy, but since I was running it through heavy distortion, I couldn’t really make use of it as a guitar synth.

More recently, I saw Steve Vai on YouTube talking about the guitar synth Robert Fripp used—probably the GR-300—and that reminded me of the GR-500. So, I pulled it out of storage and have been trying it in the studio to get more guitar-synth-like tones out of it.”

James can be seen using this guitar throughout the entire music video 'The secret he had missed'.

Stratocaster and ARP Avatar / Roland GS-500 guitar synthesizers “I use the Strat to control the Avatar, and the Roland has its own guitar. I find the two synthesizers behave differently: the Avatar’s hexaphonic fuzz sounds great, but the Roland is polyphonic, so I can play chords on it. I used synthesizers extensively on my solo album [Smallcreep’s Day], and I also played it a lot on And Then There Were Three. (Guitar Player, Jan 1981)

Here we see Blake using the GS-500 for the whole vid.

In this photo, Baxter can be seen with Roland GS-500. This guitar is now exhibited in Hard Rock Cafe in Florida.

Manuel Göttsching uses the Roland GS-500 digital modeling guitar in his Studio Roma, as detailed on the Ashra website.

You can clearly see Rypdal using a Roland guitar synthesizer in this YouTube video from 1977.

Spotted live since 2021, this Roland GS-500 synth-guitar has been mostly used to perform a cover of "Everything Ends Here" by "Blindfoldfreak" (Alessandro Cortini).

The following link comes from his own channel: Adriano Viterbini, live at Locomotiv Club in Bologna, IT (date Oct 15th 2021) https://www.youtube.com/watch?v=QWoe6TX4aeU

This other link is from his instagram page: https://www.instagram.com/p/CB0F_QJCpiq/

Here instead has been up on stage for the most part of this concert, featuring Riccardo Sinigallia and Ice One: https://www.youtube.com/watch?v=oI4hsHyp9HI

Ryo Kawasaki Group utilized the Roland GS-500 extensively in their pioneering work with guitar synthesizers, as shown in the user-uploaded photo.