Hi,
For a great many projects, mojoPortal does negate the need for web development but you are asking about moving a massive production website to mojoPortal and expecting that no development will need to be done.
There isn't a magic button one can push to make any CMS or Web Platform pull content from another CMS. There will always be some level of development effort to migrate a site from one platform to another. The Gordon site looks very nice but it doesn't look anything like any of the Skins that come with mojoPortal so development will need to be done to create the skin and I am sure the site has at least a few features that student's and faculty are accustomed to that will require development.
A car negates the need for walking to work but you still have to walk to your car.
I do not wish to be rude but I am just trying to get the point across.
HTH,
Joe D.