Gravity forms user registration using new blog templates when creating site

Hi,

I am wondering whether it is possible to have the site created using the new blog templates when I am using Gravity Forms User Registration to create the new site.

To get this form playing nicely with the WPMUDev plugins that I need to use (pro sites, new blog templates, and ultimate branding) am I going to have to hijack it at submission time and call a bunch of functions to create these integrations?

Regards,
Brendan