Is this real? BP x GTP? TreeBall?

[Armiyana]

Carpet python x royal python exists.
Carpet python x GTP exists

So by that math the GTPxRoyal is possible.

That's the best answer to your question.
Yes, this would be the first if they actually do exist. And art in fact GTP x Ball/royal
If you didn't want the extra commentary, you should have said that you weren't interested in it the ethics of it just if it's possible.
Hybrids are an EXTREMELY hot button topic as this is one of the things that can cause legislation down the line.

And if you read into that particular breeder's post, those are the only 3 that survived. The rest of the clutch died. So health issues would still be an issue.

But you do you I guess?