Teen Gothic

Hello I'm new here, and I've been wanting to ask a question. I have a really close friend that's been throwing the goth word around recently and I asked her why and she stated: Because I'm vintage Goth and like being minimalistic with just white, black,and grey. Which to my understanding isn't goth.

It's been bugging me that she keeps stating that anything black = goth. I've tried rewording things myself like when she was wearing a really cute outfit and she said she felt goth that day I said I love the alternative look. She does things like wears eyeliner on the upper and lower eye lids and says she's doing that gothic look.

I put pick me to goth in the title because she's very pick me in the way she is, and I'm not sure if because one person said she looks goth the one time she is holding on to it like a trend for compliments. My question is what's the best way to explain the culture to her where it doesn't sound rude or gatekeepy. I'm not against her being goth if she wants to be but I think she's just majorly misinformed and it's been grinding my gears.