Rajan,
We've spoken via E-Mail already about a Gauge, and yes this should be a extremely simple component to create using the SDK. So simple, in fact, that I'm torn between creating one for fun, or waiting to see if SAP wakes up and provides one out of the box with Design Studio 1.3. I guess if I knew the future I would be a billionaire, however...
Perhaps someone with the time (which I've not had much of the past few weeks) will step up and consider this an SDK challenge and give you a hand!