Where Can I Find A Working Portal Gun SWep?

Ok, i just got portal (its free until may 24th, the day after my birthday) and my gmod is always updated, but when i try use a portal gun swep, it doesn’t work and comes up with a f-lot of errors.
Can someone please give me a link to a woring one (with portal effects from portal)

Maybe garry sould of put it in gmod.

There isn’t one.
And no, he shouldn’t.
The source engine for Portal was modified quite alot.