Microsoft let Windows 10 users to connect Gmail with Cortana and to be able to get assistant in the mail , calendar, and contacts. and may make connecting skype, wunderlist and more.
How to Connect Cortana and Gmail in windows 10 :1. Open Cortana and click notebook icon
2.Click Connected services
3.Add service and select Gmail from the list
4. Enter Your data to login to Gmail.
Microsoft tries to make digital assistants more friendly and usable by adding connections to more services to Cortana.