Useful Information

From GMod Wiki

Enumeration List A list of enumerations for use in hooks and functions Lua Function List A list of all Lua functions that exist in Gmod Return types The different types of values Half-Life 2 Sound List A list of sounds you can use DSP List A list of DSP effects to use Regular expressions How to use regular expressions in lua Escaping How to escape formatting in strings Understanding Errors Understand what the error you're getting is! Bitwise Operations A very useful way to manipulate number values at the bit level Data Structures Data structures with several uses Lua Tips Tips on general lua coding HUD Elements Several HUD elements you are able to override Mesh Library Explains how to use the mesh library Stencil buffers Explains how to use stencil buffers