Includes snippets for constants, variables (global & local), functions, and JavaScript syntax highlighting for GML files.
Copy the "GameMaker-Snippets" folder to the SublimeText packages folder. Get to this folder quickly in SublimeText via the "Preferences > Browse Packages..." menu item.
Made for SublimeText 2. No guarantees on the GML syntax highlighting.
As noted by @Uduse, a SublimeText 3 implementation can be found here ( https://github.com/Uduse/Sublime-GameMaker-Studio-Language-Bundle )