Hi Jinxxxxx,
2006-08 model is derived from 2610
2008-10 from gvn53
2012 it's not a garmin manifactured item

For the upgrade to 2009 systems you need to buy the gps as spare part and it's antenna.
Remove the old part and connect the new one. Follow the antenna cable under the dash, disconnect the old one and connect the new antenna, find a suitable position under the windscreen.
Price around 500$ plus vat and shipment.