By creating a Google Alert, you can get notifications any time Google finds new results on a topic that interests you. For example, you could get updates about a product you like, find out when people post something about you on the web, or keep up with news stories.
For help creating your alerts, please refer to Google's guide here.
Create your Google Alert with the required configuration and set Deliver to to RSS Feed.
Copy your alert's RSS feed URL using the RSS icon.
Switch to Geckoboard and create a RSS/Atom Feed widget. Paste your URL into the RSS/Atom feed url field.
Click Add widget when you're ready. Learn more about configuring the RSS/Atom Feed widget.