GCal Default Calendar Setter is a Chrome extension developed by Kikoki. It falls under the category of Browsers and is specifically listed as an Add-ons & Tools subcategory. This extension provides a convenient way for users to set their own default Google Calendar.

With GCal Default Calendar Setter, you can easily create events with your selected default calendar using two methods. The first method involves using the Command-X shortcut. By pressing Command-X, you will be automatically redirected to the event creation link, with your chosen default calendar already selected.

The second method involves hovering over a date on the monthly view of the Google Calendar tab and pressing the Shift key. This action will redirect you to the event creation page, with not only your chosen default calendar selected, but also the date you hovered over pre-filled into the date field.

This extension enhances scheduling capabilities on Google Calendar, making it smoother and more seamless, ultimately boosting productivity. There is also a toggle switch setting that allows you to determine whether the shortcut Cmd-X works browser-wide or only site-wide. If set to site-wide, it will only redirect you to an event creation link with the chosen default calendar preselected if you are on a tab displaying Google Calendar.