Yes, you can import Gmail contacts to iCloud on Windows. The easiest manual way is to export contacts from Gmail and upload them to iCloud.com using any web browser. If you want a quicker option, especially for many contacts, tools like MailConverterTools Gmail Backup Tool allow you to import Gmail contacts to iCloud directly from a Windows system while keeping all contact details intact. Read more: https://www.mailconvertertools.com/blog/import-gmail-contacts-to-icloud/