That is not the ignition switch that comes with the GTM kit.....and also not the normal place to install it. I'd say you're probably going to have to pull the dash out, get the ign switch out and see if it has a part number on it or any way to identify what it is so you can buy a replacement.
On second look, it does appear that there is a plate that your AC controls are installed into. Instead of pulling the dash, you may be able to pull that plate off and hopefully have enough room to reach your arm back in there to get to the ign switch?