Install Pre-requisites:

sudo apt-get install libglib2.0-dev libgtk2.0-dev libglade2-dev libgnome-keyring-dev gksu subversion build-essential autogen automake autoconf intltool openvpn

Download Gopenvpn source:

svn co https://gopenvpn.svn.sourceforge.net/svnroot/gopenvpn gopenvpn

Change directory to Gopenvpn and run:

cd gopenvpn/trunk/gopenvpn/
autoheader
./autogen.sh
intltoolize
./configure
make
sudo make install

Run Gopenvpn as admin without password prompting by inserting this into /etc/sudoers:

%username ALL=NOPASSWD: /usr/local/bin/gopenvpn
%username ALL=NOPASSWD: /usr/sbin/openvpn   

“username” is exchanged with the local username.