Good morning ..
I would like to know how to convert an email (Gmail) on a task.
There are two ways to add an email as task:
1. Linking to it using our plugins which will create a task with a link to the particular message.
2. Sending it to a project which will not create a link, but instead convert the entire message to a task with a task note.
We've described both options and their advantages on our blog in this post: https://todoist.com/blog/2013/01/zero-inbox-policy-with-todoist/