Click on Applications at the top, left-hand corner of the screen and select System Tools.
Then select Settings.
Select Online Accounts from Settings.
In the online accounts list, click on Google.
You will then be presented with a Google Account sign in window where you can provide your Google credentials, e.g., an email address or phone number.
After you hit enter and log in, you will then be asked to accede to allowing GNOME to access your Google account, which will allow GNOME the following access:
You can scroll down to the bottom of the list and click on the Allow button to accept the agreement. You can then close the Google Account window by clicking on the "X" at the top, right-hand side of the window.
If you then click on Applications and Files, you should see your Google account listed at the left side of the window. You can then copy files to and from your Google Drive folders to the local host or access files already stored in Google Drive.