Jon,
In Google Analytics, under the Territory account, could you turn on the demographics option so we can learn more about the Audience donating through the Classy donation forms. If yes, go to admin, Property Settings, and scroll down to enable Demographics and Interest Reports.
I’m not sure how long it will take to generate – will it collect what’s already been gather from the GA code or will it start from when you turn it on. But once the reports are ready, you can click on Audience – Demographics to see our donors age range and gender as well as Interests (Audience – Interests – Overview).