The easiest way to backup Wordpress to Google Drive is to use a special add-on, such as the UpdraftPlus add-on.
You must be in cPanel
At the bottom, select WordPress
Here, select the page you want to back up and select Login as admin
After that, select Plugins and then Add new
On the right is a search bar where you type UpdraftPlus in this example
After which you download it by selecting Install Now
After that, you activate the add-on
The add-on in question appears in the Settings tab in the left menu
Here you can go to the front page of the add-on
From which first select Settings
Here you can choose how often and from where the add-on takes backups
And from here select Google Drive
Sign in with Google
Select the account for which you want to back up
Next, you need to allow the service to use this account for backup
After which you give permission for the UpdraftPlus service
And now you can Backup
Then you select what you want to back up
