In CHAPTER 8.3 GCS & GCE Challenge Lab Demo, from where I can get script file?
It’s right there under the Resources section, named Download Transcript.
My apology. I mistook it with the "Download Transcript" link (still don’t understand why ACG want to the transcript link there to download on every lesson, it’s not a resource for lesson).
You can find the mentioned script in the lesson 8.1 – GCS & GCE Challenge Lab, look for the line GCS & GCE Challenge Lab Startup Script.
I put the link here for convenient GCS & GCE Challenge Lab Startup Script