I finally have a half decent way have a two way sync with a local folder on my Linux machine and Google Drive.  I figured I would share this post with anyone who might be looking for a similar function.

There is a tool available call gsync, which provides rsync like functionality with Google Drive.  Here is a link to the project page:

https://code.google.com/p/gsync/

You can easily install gsync on Fedora (yum or dnf):

sudo yum install python-setuptools
sudo easy_install pip
sudo pip install gsync
or install on Ubuntu:

sudo apt-get python-setuptools
sudo easy_install pip
sudo pip install gsync
Once installed, you have to authorize gsync to access your Drive, run the following command and follow the directions:

gsync --authenticate
Once authenticated you can sync a local folder with Google Drive like so:

gsync -r -t -p -o -g -v --progress --delete -l -s /local/folder-a drive://folder-a
The options are similar to rsync options, here is a list of the options I used above:

-r = recursive
-t = Preserve modification times
-p = preserve permissions
-o = preserve owner
-g = preserve group
-v = verbose
-l = copy symlinks
-s = no space splitting
--progress = Show progress during transfer
--delete = delete extraneous file from destination directories
You can get a full list of options by typing:

gsync --help
To create a two way sync between a local folder and Google Drive you simply run the command twice, reversing the directory order like this:

SYNC LOCAL TO GOOGLE DRIVE:
gsync -r -t -p -o -g -v --progress --delete -l -s /local/folder-a drive://folder-a
SYNC GOOGLE DRIVE BACK TO LOCAL:
gsync -r -t -p -o -g -v --progress --delete -l -s drive://folder-a /local/folder-a
I set this up in a simple bash script and have it run once a day via a cron job. Right now I have all the output redirected to a log file and sent to me via email so I can keep an eye on it and make sure it is behaving as expected.  It has been solid for the last week or so.  The only issues I have run into are file permissions after being synced from Google Drive to local (which are addressed in the script below), and a file will occasionally sync two days in a row (even though it never changed).

#!/bin/bash
LOG=/tmp/gsync.log

echo "Sync local with Google Drive:" >> $LOG
gsync -r -t -p -o -g -v --progress --delete -l -s /vault/Documents/ drive://Documents >> $LOG

echo "Sync Google Drive with Local:" >> $LOG
gsync -r -t -p -o -g -v --progress --delete -l -s drive://Documents /vault/ >> $LOG

echo "Setting permissions on new files:" >> $LOG
chown -R user:user /vault/ >> $LOG
echo "All files chowned..." >> $LOG
chmod -R 750 /vault/ >> $LOG
echo "All files chmodded..." >> $LOG

tr -cd '11121540-176' < /tmp/gsync.log | mail -s "GSYNC" [email protected]
rm -f $LOG
I hope this helps somebody, and we can only hope that Google will show some love to it's Linux users.

NOTE: If you are having issues with files uploading, please read the below sent in by a user named "tidbits". 

This is also needed in order for files to be uploaded. If this is not added, only directory/folder structure is created and no files uploaded.

First verify your python version - $python -V

Then goto corresponding /usr/local/ like below.

Editing /usr/local/lib/python2.7/dist-packages/libgsync/drive/__init__.py, and changing:

body = {}
for k, v in properties.iteritems():
body[k] = _Drive.utf8(v)
...to:

body = {}
for k, v in properties.iteritems():
if v is not None:
body[k] = _Drive.utf8(v)

This will resolve any file upload issues. But... 

It does, however, produce this when it runs into a file that ends in a ~ character:

0 0% 0.00B/s 0:00:00DEBUG: 'Exception': File "/usr/local/lib/python2.7/dist-packages/libgsync/drive/__init__.py", line 712, in update
status, res = req.next_chunk()
File "/usr/local/lib/python2.7/dist-packages/oauth2client/util.py", line 132, in positional_wrapper
return wrapped(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/apiclient/http.py", line 874, in next_chunk
return self._process_response(resp, content)
File "/usr/local/lib/python2.7/dist-packages/apiclient/http.py", line 901, in _process_response
raise HttpError(resp, content, uri=self.uri)