The purpose of the Grive2 project is to provide an independent open source implementation of Google Drive client for GNU/Linux. It uses Google Drive REST API to talk to Google Drive service. The code is written in standard C++.
Grive2 is the fork of the original abandoned «Grive» (https://github.com/Grive/grive) with added support for the new Drive REST API (original version was using the «Document List API» which is now shut down) and some new features, for example, partial sync.
The source code of Grive2 is released under GPLv2.