You can use AxCrypt to secure your files which are all stored in your Google Drive.
AxCrypt Cloud Storage Awareness is really just about detecting installed cloud services, creating a “My AxCrypt” folder and then designating the created folder as ‘Secured’. However, the feature is really useful only when the folder is Secured, i.e. monitored for new files to encrypt.
So sync your google drive files in your local or some where else and encrypt those files using the AxCrypt app.
You can able to encrypt your folder contents by just drag and drop the folder to the Secured Folders area from the Axcrypt app.
or Right click on the Secured Folders area and choosing Add Secured Folder option from the context menu.
You can also use our AxCrypt Key Sharing feature to share the encrypted file with someone. For key sharing : https://www.youtube.com/watch?v=9z3KOZD-Yks .
Please check out our video tutorials at https://www.youtube.com/channel/UCoSoXBjq6iCG5232fHoWStA to get started with AxCrypt.