You'll find most the things in the readme, such as proper credits, but here's a short story:
So, I was playing TF2 one day and the map currently on was none other than Granary. It being one of my favourite Arena maps, a thought hit me: Why don't I make this for Goldsrcs! .. And that's that.
Also, a short film:
https://www.youtube.com/watch?v=zArA8CbR7Ec
You are free to redistribute this as long as the content of the zip file remains the same (de_granary.bsp, de_granary.nav, readme.txt) and untouched.
[Boomer]
[Boomer]