From Jayski.com:

MORE: When Jeff Gordon broke the news at Sonoma that he and girlfriend Ingrid Vanderboush were engaged to be married the racing media not only was curious how he proposed but also if there was a prenuptial agreement since Gordon was forced to give up millions following his bitter divorce to Brooke Sealy. Asked in a light-hearted way during the Infineon Raceway post race press conference Jeff chuckled and said “I think she knows that I’m a lot smarter the second time around. I guarantee you one thing...she’s got a much better guy this time around and I’ve got an amazing girl this time around to. I can’t say there’s any big story to the engagement. We’ve actually been holding it to ourselves for about a month. Because we didn’t do it the traditional way and get down on one knee and go to some fancy restaurant or Eiffel Tower or something we held onto it for a while until we were ready to tell people.” Gordon chose to break the news to family and friends who live in and around his hometown in California. “As much as we travel you’re not typically in a place where you can get a bunch of people together. We wanted to let our family know first obviously and so it was great to be able to do that.” As far the pre-nup thing? Jeff smiled and said, “You’ll have to ask her.”(PRN's Garage Pass Radio Show)(6-28-2006)