Where can i find deathrun gm???

I’m new to exploring gmod games and I’d like to host if possible for my friends via lan/net
a couple of questions///

1.Where can I find the game mode for deathrun?
2.Do only certain maps work per game mode?
3.Any other good game modes I need to get a hold of?
Thanks in advance!

(PS I HAVE CHECKED GOOGLE AND GARRY’S SITE ALL I CAN FIND ARE THE MAPS)