Boss releases GM-800 system program Ver.1.50

July 1, 2026 · 2 sources

Boss released GM-800 system program Ver.1.50 in July 2026, according to the update page on the company's support site¹. The update adds a tracking mode to GK SETTING, improves system stability and fixes an operations issue¹.

The new setting is described on the page as a "TRACKING MODE that prioritizes responsiveness and reduces latency has been added to GK SETTING"¹. The page states that GK SETTING can be switched according to how the player plays¹. It also asks owners to update BOSS TONE STUDIO for GM-800 as well¹.

The other changes in Ver.1.50 are listed as "Improved system stability" and a fix for "The issue with the unit's operations sometimes being disabled"¹.

The same tracking mode addition appears in the Ver.1.50 notes for the VG-800, also dated July 2026². The VG-800 notes list a different set of bug fixes: MIDI control messages for EXP1,2 and GK SW1,2 not transmitting correctly, ASSIGN not working correctly, and the output level sometimes changing².

The GM-800 update history on the page lists earlier releases: Ver.1.20 in January 2025, which added the GK Audio function, PART HOLD as a TARGET in ASSIGN SETTING, tuner modes and a 20-minute default for Auto Off; Ver.1.10 in May 2024, which added support for the BOSS GK5-KIT-G6, GK5-KIT-G7 and GK5-KIT-B, an OUTPUT MODE parameter for the normal pickup sound via the GK IN jack, and support for 7-string guitars with the GK5-KIT-G7 installed; and Ver.1.03 in July 2023, which added support for BOSS TONE STUDIO for GM-800¹.

The GM-800 is a guitar synth unit in Boss's lineup of synth pedals. The update page gives the installation method: the file "GM-800_UPA_up.bin" is copied to the root directory of a USB flash drive formatted on a GM-800, and the unit is powered on while the [WRITE] button is held¹. The page warns against powering off the unit during the update¹. No price is given for the update.