Conky Transparency Workaround For Gnome Shell (Tested With 3.6.2)

conky.sh

#------------------------------------------------------------------------------#
# Use "own_window_type panel" for transparent background		       # 
#									       #
# "own_window_type override" doesn't work with transparent background          #
# Conky always have a black background.                                        #
#									       #
# "own_window_type panel" work as panel when you start, it have egdes etc. But #
# if you change conkyrc, conky loses "panel" condition and start working like  #
# "own_window_override"  minimizing windows doesn't affect Conky's window.     #
# It always stays on Desktop as transparent                                    #
#------------------------------------------------------------------------------#
#-----------------------------------USAGE--------------------------------------#
# 0) Change own_window_type xxxx to own_window_type panel in your conkyrc      #
#								               #
# 1)Create a copy of your conkyrc file and rename it as conkyrc.change under   #
# the same directory of your conkyrc.                                          #
#									       #
# 2)Save this script under the same directory of conkyrc use conky.sh or       #
# whatever you want to  rename this script then                                #
#									       #
# 3) chmod +x scriptname.sh                                                    #
# 4) $ ./scriptname.sh							       #
#------------------------------------------------------------------------------#

#!/bin/bash

conky -c conkyrc;
sleep 3;
cat conkyrc.change > conkyrc
exit 0;

Just forget it.
Using "own_window_type dock" rock solid solution for Gnome.