If you are looking to convert emails from Gmail to Outlook then you will go with this informative article Transfer emails from Gmail to Outlook. This article will give you the most secure manual solution to migrate the process. However, the manual solution is a lengthy and time-consuming process. 
Therefore, they will also offer an advanced solution Gmail Backup Tool. The software is the most trusted and effective solution that backup Gmail to a hard drive in various file formats such as PDF, PST, CSV, MBOX, EML, HTML, etc. It also offers to migrate Gmail items to Office 365, Yahoo Mail, Hotmail, Thunderbird, iCloud, etc. Moreover, They also facilitate users to prevent unwanted duplicate emails from backup & migration. You can save or backup emails without attachments in the migration process. Additionally, it supports all versions of the Windows operating system. You can try the trial versions of the software to explore the performance.