My GF (24) is lacking in the street smarts category and I (25) am not sure what to do about it.

I just want to point out that your definition of “street smarts” is hilariously misguided.

My brother is like this but he’s just 14. it doesn’t matter which category of smart she lacks at. You seem to love the girl so just be patient and teach her what she should learn.

Like others said, she is lacking in common sense not street smarts. I’ll give you that the two sometimes overlap, Like if you walk in a unfamiliar bad neighborhood at night wearing expensive jewelry… You are lacking both street smarts and common sense.

Edit- spelling