[kipper]

Soapy water leaks from the bottom of the dishwasher door. I assume I need to replace the door gasket, right? But do I need any other parts to do this job? (such as the "gasket insert"?, or anything else, etc.?) Is this a job a general handyman-type guy can do without too much trouble? Thanx!

[Gene]

Did you see a lot of suds inside the dishwasher?
Did you use the rinse aid recently?

If "yes" then it could be spilled rinse aid at time of filling the container or leaking rinse aid container itself (#811 on the door break down diagram).

If you did not use any rinse aids, then it could be a soap for manual dish washing.
Even if you used it to rinse dishes before load them into the dishwasher and did not rinse the soap out.
A few drops of such soap will create a lot of suds, causing a water leak through the door.
The last thing I would think about is a door gasket.

- Here are the break down diagrams for the GE dishwasher Model GSD4030Z07WW

Gene.