Now let's add a reference to the Drive app to the Documents folder in your Library. Open My Computer and locate the Documents folder. Documents will be the first listing under Libraries on the left side of your screen. Right-mouse click on it and select Properties. Click "Include a Folder" and navigate to your Google Drive folder. Click the Include folder button. Click Okay at the bottom.
Now when you are in an application your click File-->Open like normal, then click Libraries on the left side, then Documents.
When the Documents folder is open, you will see two sections - one that shows the files in My Documents and one below it that shows the contents of your Google Drive.