There are lots of different aspects to "preparedness".
Are you saying she is one of the people who just float through life thinking that 'everything is OK and will always be OK and nothing bad ever happens?'
Here on arfcom, folks tend to focus on 'preparedness' as in having one's guns ready at all times.
We tend to overlook the overview of personal safety:
Commonsense things like having money on hand. Asking ourselves how wise is it to drive through a bad part of town after dark?
Keeping a good stock of necessities on hand.
Avoiding personal danger so that one doesn't "have" to confront it. I was a social worker for 12 years and was in high crime areas daily. Now that I am out of that line of work, I really see the wisdom of just avoiding a lot of people and places.
There in Georgia ya'll occassionally have tornados and ice storms. Talk with her about commonsense preparations for things like that.
The Katrina fiasco wasn't long ago or far away. Talk with her about how things fell apart in the urban areas then.
And things almost always turn sour when a boyfriend "tries to teach" his girlfriend what he knows and thinks she should know. Start open-ended conversations about preparedness without the goal of teaching her one thing or another. Present a topic, let the conversation take whatever turns it takes. You just be there as a source of knowledge when she is interested.