Thanks for the feature request! I assume you are referring to this API? https://wiki.gephi.org/index.php/Graph_Streaming
With the 0.9 release, we now have a few more features in graph visualization: per-vertex coloring and custom layout (vertex positioning), as well as integration with our new GraphLab Canvas interactive browser experience. However, Gephi is a great tool and currently can do much more to visualize graphs. We will consider this for our future roadmap.