I am looking for a way to easily generate gantt charts from Rails. The
way I am considering is drawing
the chart from RMagick, but would prefer an existing solution if it is
available. It does not look like Gruff
handles Gantt Charts.
Timeline, while not technically a gantt chart, has much of the same
capabilities and a slick google-maps-like AJAXy feel. It is easily
integrated into a Rails project.
Also check out redmine and ProjectLounge Lite, which are rails-based
project management systems with built-in gantt charting. They're open-
source; you can see how they do it.