Download and install GainTools Gmail to G Suite Exporter on your Windows OS.
Provide host, port, username and password of Gmail account and click Authenticate button.
Now, fill details of G Suite account i.e. host, port, username and password.
Choose a folder of Gmail account that you would like to export. Also, you can apply filters.
Select an existing folder of G Suite account or create a new folder to save exported emails.
Finally, click Start transferring to commence the task of migration.