I can succinctly disprove your statement claiming there is no trans at S;G by providing you with a link that serves as irrefutable proof stating that at least Ruka is a transgender woman.

Kurisu has a page implying she may also be a transgender woman as well.

https://lgbtqia-characters.fandom.com/wiki/Makise_Kurisu

Ruka UrushibaraLGBT Characters Wikia

I don't care what another website say, this link doesn't prove anything, me i can put this link:

https://web.archive.org/web/20241117114825/https://ask.fm/SciADV/answers/134817454903

So why isn't Luka trans? | ask.fmhttps://ask.fm/SciADVASKfm

It's one of the official translator for S,G. And when the creators where asked they say no. So there is no point. And i don't want to discuss about kurisu, it's dumb.

Edit: If you want more: there is already a lot of debates like here for exemple, that's why i don't want to discuss this a 26th time.

Luka UrushibaraSteins;Gate Wiki

Edit 2: Muhahaha the link you provide ftor kurisu was deleted with this reason:

Not actual lgbt character

Are you the one who wrote the page to create a source for your dumb statement?