The Gantt Graph is a grid component. You can organize chronologic data in a time line, to schedule tasks to resources, for example.
At this time, it is not very interactive as Cartesian Graph, but it draws a special type of information which is harder to represent than just ordered XY points.
This component is being developed and it is not very stable yet. We look forward to represent a complete Gantt graph with a easy-to-use API.
You are invited to use, test and comment it. With your contribution it only can be better.