Get the brand established with G9 Girl. Then branch out to G9 Woman, G9 Jr., and G9 Baby.
Just curious, but do you have a regular media campaign going... regular press releases to various magazines? Seems like you'd want to target not only the teen/tween mags, but those that mom reads as well. I'd be hitting all these and more. Sounds like a stretch, but if you get ANY press anywhere, figure out a way to mention Oprah. Her organization will eventually hear about it and I could see her taking an interest in G9 Girl.
When my daughter was a baby a couple of friends and I started a stay at home dad group. We got lots of press. One guy was quoted as saying, "We just want to take care of our kids. It's not like we want to be on Oprah." Well a week after the story ran Oprah's folks were calling to discuss when he could be on the show. He declined, but can you imagine the value of that exposure?
Sorry for the unsolicited advice. As a stay at home dad I don't get to put my marketing background to use very often!