To
import Gmail contacts to iCloud without duplicates, avoid direct syncing and prepare your contacts first. Clean your Gmail contacts by removing repeated or unnecessary entries before exporting them. Then upload the exported contacts to iCloud Contacts using the import option. After the import, iCloud also allows you to merge any remaining duplicate contacts.
For large contact lists, backing up and filtering contacts in advance is helpful. Tools like the
MailConverterTools Gmail Backup Tool can export Gmail contacts accurately while preventing duplicate entries, making the import process cleaner and more reliable.