Existing Gmail account: Go to iPhone Settings > Mail > Accounts. Tap your Gmail account. Tap Contacts to On.New account: Go to Settings > Mail > Accounts > Add Account > Google. Enter address and password. Tap Contacts to On.
This article explains how to sync your Gmail contacts to an existing Gmail account on the iPhone. It also includes information on how to sync your Gmail contacts when you initially set up a new Gmail account on an iPhone. These instructions apply to iPhones with iOS 14 or iOS 13.
Syncing Contacts to an Existing Gmail Account on iPhone
Although you can choose to sync your Gmail contacts when you initially add the Gmail account to your iPhone, you can add them later to an existing Gmail account.
Syncing Contacts When Adding an New Gmail Account
If you haven”t added your Gmail account to the iPhone, you can do that and sync the Contacts at the same time.