To enable these features you will need to navigate to your User Account. For more information on how to find this click here. Once in your user settings you will see two new selections, Integrations and Calendar see below for more details.
Click into the Integrations menu item and you will see the option to select either an Outlook Calendar Integration or a Google Calendar Integration.
To set up your Google Calendar integration is a relatively simple process. You will just have to follow the connection prompts from Google. First select the Google Calendar Integration 'Connect' button.
This will take you to the Google sign in window. Sign into your Google account here.
Follow the prompts to accept the permissions and integrations settings. Once you have done this you will be prompted to set up your integration. For more on this process click here