In order to make sure that email address links open through Gmail by default you will need to make sure that you have Gmail set as your default email handler.
1. To begin, Open Google Chrome and navigate to gmail.com
2. Click on the Protocol Handlers icon in the far right of the address bar. (If you do not see the icon, click here)
4. At this point, if you are using a Windows PC, you will also want to set your Default Mail Client in the settings of your PC. Open the Settings app and click on ‘Apps’
5. Now you will select ‘Default Apps’ on the left side, click on the app that is listed below ‘Email’ and then select ‘Google Chrome’ from the dropdown menu.