You can easily import OLM file to Gmail using Third-party software like KDETools OLM Converter. OLM to Gmail migration allows checking the preview of mailbox data items & attachment before actual conversion is done. The software maintains OLM items such as emails, contacts, calendar, folder, subfolder, tasks, journals, notes and etc.
Hi, if you want to import the OLM files to Gmail account, then you can utilize the greatest tool i.e. CubexSoft OLM Converter that can easily migrate Mac OLM files to Gmail app including all emails, contacts, calendars, tasks, notes and attachments. It can directly import multiple Mac OLM files to Gmail at once without any kind of data loss. It also provides a free demo version which allows to move only 25 OLM items without any cost.