[Need Suggestions] Gmod Addon & Scripts

I'm trying to make a Gmod server for me and my friends, I've got a few ideas on how to code lua scripts of my own, basically I'm trying to make a survival server with a Battleroyal-like gameplay, imagine DayZ but battleroyal like PUBG, any good scripts you guys could recommend I can use to improve my server?

Also, you guys know any good inventory / crafting systems for Gmod?