Instructions apply to all Android versions and devices across all manufacturers, although menus and options might differ slightly.
opt for Gmail account.
Confirm with a tap onRemove Account.

OpenSettingsand tapAccounts,orUsers & Accountson some phones.
Tap the Gmail account.
You may need to tapGmailfirst on some devices.

Scroll down toGmailand tap the toggle next to it to disable Gmail from syncing to your phone.
Some devices might call this settingSync Gmail.
Scroll down and tapSettings.

Tap the relevant account.
SelectNotifications>Noneto turn off notifications.
On some Android devices, you could’t remove a Gmail account.

Instead, disable it atApps>Gmail>Disable.
FAQ
To remove a Gmail account from an iPhone, tapSettings>Mail>Accounts.
Tap your Gmail account and selectDelete account.
Use this process todelete any email account from an iPhone.
SelectMenu(three dots) on a profile >Delete.
On an Android, select yourprofileicon, tapManage accounts on this gadget, and selectRemove Account.