Open Google Calendar in your browser.
Click on the arrow next to Other calendars in the panel on the right.
Select Add by URL.
5. Paste the URL you copied in the first step.
6. Click Add calendar.
NOTE: You can click on the calender you've added in order to hide or show it. Also, Google Calendar only updates twice a day, so your bookingkit feed will not import data in real time. More information is available in the Google Product Forums.