Hi Bilal,
That's a great question, and brings up a very important requirement of GWR. Unfortunately, Geographically Weighted Regression does work best when you have lots of observations with geographic coordinate systems. Ideally, you'll have at least 80 or so features. The dataset that you have seems very interesting, but with only five features for analysis GWR is not going to be the right tool for the job.
Hope this helps!
Lauren Rosenshein
Geoprocessing Product Engineer