Grive Tools is described as 'There is no official Google Drive Client available for Linux at the moment, but a command line program called Grive provides an open source Linux solution'. There are five alternatives to Grive Tools for Windows, Linux and Mac. The best alternative is Insync. It's not free, so if you're looking for a free alternative, you could try Syncdocs or jdrivesync. Other great apps like Grive Tools are overGrive (Paid) and Gdocsdrive (Paid).
Syncdocs syncs folders between all your PCs and Google Docs. Simply use Google as a your network gDrive. Select a folder on your PC, like “My Documents”. Syncdocs copies this folder online and then keeps it in sync across all your PCs.
GDocsDrive is a powerful desktop client tool for Google Docs, which makes Google Docs truly become a Google Drive (GDrive) on your desktop by enabling you to upload your files and folders with just a single drag and drop.