GtoGC is a Chrome add-on that allows you to sync your cybozu Garoon schedule with Google Calendar. With this extension, a calendar called "garoon-sync-calendar" is created in Google Calendar, where all your Garoon schedules are automatically registered. Please note that this is a beta version.

Version 0.0.4, released on June 30, 2023, includes a fix for an issue where the program would not work when retrieving unnamed schedules from Google Calendar. Now, the program is able to retrieve and function properly even with unnamed schedules. Additionally, there is a fix for the problem where schedules that were rescheduled to a different date and then reverted back to their original date were not being synced. Now, these schedules will be properly synced.

In version 0.0.3, GtoGC introduces the ability to sync schedules that do not have an end date set. Furthermore, even if a schedule fails to sync, the extension will attempt to continue syncing other schedules.

GtoGC is a free add-on developed by taiga533 and is available in the Browsers category under the Add-ons & Tools subcategory.