I couldn't find any codes to display commodity prices on the desktop, so I just wrote it up on my own.
Bloomberg was chosen as a commodity price reference site.
I uploaded ".glet"s only for gold price. If any of you wants to know how to display other commodity prices like silver, crude oil or corn, please check this blog. http://abroadoctor.blogspot.ca/2014/01/display-commodity-prices-on-desktop.html