I generated this simple symbol directly from the Wikipedia trans symbol. I made this to use as a negative image stencil for doing airbrush tattoos. License from the original file is preserved, I have contributed essentially nothing to this. You're welcome.

The OpenSCAD code I used is below.

$fn=200;
difference(){
scale([4,4,1]){
color("Black")linear_extrude(height = 0.5){
import("Gender_sign.svg", center=true);
}
}
translate([0,1.08,0])
cylinder(d=5.4,h=4);
}