Nope and there never could be, thank God. The “gay panic defense” was just a falsehood, a way to manipulate the truth to make it seem like there was some way to justify being a hateful bigot with no morals or ability to control themselves. And it never worked, it was never a successful defense anyway - thanks to educated people with more intelligence being able to see right through it for the morally corrupt bullshit it really is. Nothing can justify murder or assault, and judges and smart people know that.