how do iget this to work?

Its a tutorial of wire mod i installed it and i can’t get it to work…any help?

For this, you need to extract it to the garrysmod folder, this:
Steam\steamapps\your username\garrysmod\garrysmod

And if it tells you to overwrite, click yes.

did that but it doesn’t open up in game…

It seems the tutorial website doesn’t work anymore so it won’t work unfortunately. You can find some wire tutorials here:
http://www.wiremod.com/forum/wiremod-tutorials/6831-firegod522s-wire-tutorials.html