I did as you say and it doesn't work. It says it's not one of GoGs codes.
One thing is, you have two dashes in there but none of the other codes have dashes in them. I tried with and without the dashes and neither work.
People should thank when they get the free game to be polite, but also so that the rest of us don't waste time trying a code that's used.
Hey buddy, I tried and it seems that this is a Steam code, someone else already redeemed it though, just FYI.