- Install the program ZABAPGIT on your ABAP system -> https://github.com/larshp/abapGit
- Start ZABAPGIT, "+online" to add the repository https://github.com/ivanfemia/abap2oauth2, and pull it
- "+online" of the current repository, and pull it
- Configure your account to Google APIs
- Ask your client ID and secret at Google APIs
- Create an entry in table ZOAUTH2_CONSUMER : consumer, client ID, client secret, signature method (3 for Google Apps), API host, redirect URIs, javascript origin
- Run the program ZGAPPS_UPLOAD, enter the consumer, choose a file and run the program
- Go to Google Docs and see your file