Garry's Mod Server Hosting: Setup, Addons, and Performance

Garry's Mod's biggest strength — an enormous addon and gamemode ecosystem — is also its biggest performance risk. A server that starts smooth on launch day can slow to a crawl six months later under the weight of accumulated addons.

Choosing a Gamemode Shapes Everything

• Sandbox — lightweight, mostly limited by player-spawned props and entities
• DarkRP and similar RP gamemodes — heavier scripting load, database-backed player data, and typically the most addon-heavy setups
• TTT, Prop Hunt, and similar — moderate load, usually well-optimized by the community

Sizing your plan should be based on your gamemode choice first, player count second.

Managing Addon Bloat

Every addon adds Lua scripts that run on each server tick. A handful of well-coded addons is fine; dozens of overlapping, poorly optimized ones from different authors compound into real lag. Periodically audit your addon list and remove anything unused or redundant — treat it the same way you'd treat plugin bloat on a Minecraft server.

Workshop Collections Simplify Updates

Using a single Steam Workshop collection to manage your addon list makes updates and reinstalls dramatically easier than manually tracking individual addon IDs, and keeps your server and any staff testing environment in sync.

Database Considerations for RP Servers

DarkRP-style servers store player data (money, jobs, inventory) in a database. A slow or overloaded database causes noticeable lag spikes completely separate from server CPU load — make sure your host's disk I/O (NVMe, not spinning HDD) can keep up, as covered in our NVMe vs HDD guide.

Protecting Against Griefing and Exploits

Popular GMod servers, especially RP servers, attract exploit attempts. Keep addons updated, use a trusted admin mod, and make sure your host includes DDoS protection by default rather than as a paid extra.

Getting Set Up

A good panel installs GMod and lets you attach a Workshop collection ID directly, without manual SteamCMD commands. RepublicNodes' game hosting plans run on NVMe storage with DDoS protection included, built to handle addon-heavy RP servers without buckling under load.