my icloud calendar from gmail syncs with my ipad and gmail but won't sync on icloud on my pc

My ipad mini and my gmail contacts are syncing but if I go to icloud.com not of my calendar events are listed. In the upper left corner it just says CALENDAR. My ipad mini is set up to sync with my gmail account and that seems to be working. I tested entering a new event on my ipad and it synced to my gmail calendar but won't sync to icloud.com apple account.