Google Drive app on Ubuntu? Yep! Thanks to Insync...

I did this on my modified Chromebook (ChrUbuntu 12.04).

And it worked just fine! :-) 

https://www.insynchq.com/

Step 1: add the Insync public GPG key for authentication

wget -O - https://d2t3ff60b2tol4.cloudfront.net/services@insynchq.com.gpg.key | sudo apt-key add -

Step 2: add Insync repository to your apt repository. -- More Info 

sudo sh -c 'echo "deb http://apt.insynchq.com/ubuntu $(lsb_release -sc) non-free" >> /etc/apt/sources.list.d/insync.list' - See more at: http://www.howopensource.com/2012/11/install-insync-google-drive-client-in-ubuntu-12-10-12-04-ppa/#sthash.9zhlcpUs.dpuf

Step 3: update your repository 

sudo apt-get update

Step 4: Install Insync

sudo apt-get install insync-beta-ubuntu

ALMOST....

Screenshots here, ifyaneedum.

Start it up from the Unity bar thingy
Your default browser will pop-up. 
Sign into your account and then... 
Grant Access

I know...  i suck... no screenshot

wait... wait... actually, I was all impatient and clicked stuff several times before it was really ready, I guess... 

but eventually my clicks caught-up and @ some point and...

a nifty new little icon in the sys tray for Insync... Right-mouse click that and off you go!