There is no "official" Monero desktop ticker but there is a Monero Monitor Chrome add on and available source code from community member bigreddmachine and a Firefox add on mentioned on the same HelloMonero page.
The CoinGecko ticker you linked to is meant to create website or blog widgets not your desktop:
Looking for a cryptocurrency price widget which includes major digital currencies like Bitcoin, Litecoin, Dogecoin, Darkcoin, and more? CoinGecko has a price ticker widget that you can embed for free into your website/blog.
You did not mention if you use a Windows, Apple or Linux PC. There are methods to convert web widgets into desktop widgets which can be found on Stack Overflow.
If you are an Android user, the CoinCap.io app seems to have good reviews. Always be very cautious when downloading cryptocurrency apps and widgets, particularly those that are closed sources or from unknown parties.