I'm not sure what GIS is, so I'd have to answer no.
By overlay, what I meant was I used the link that showed the rainfall, along with google maps, and then also the map showing the locations of Twangiza and Namoya from Banro's site. It was kind of crude, but overlaying those maps showed me that Twangiza has likely seen precipitation in the 50-100mm range over the last 10 days, and Namoya has seen in the 25-75mm range. Very crude, but nothing to make me overly concerned of higher than normal rainfall in that part of the DRC.