How To Logout Gmail From Other Devices?

Open Gmail on a browser or the Gmail app

Tap your profile picture in the top right

Select Manage your Google Account

Go to the Security tab

Scroll to Your devices

Tap Manage all devices

Select the device you want to log out from

Tap Sign out

Repeat for any other devices you want to remove

Change your Google Account password if you want to sign out from all devices at once

Turn on 2-Step Verification for added security