It doesn't support the creation of GANNT charts... just simple line, scatter-line, bar, area, and pie charts.
Sorry we don't have an app or customization services for this pariticular situation.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.