Perhaps you're looking for one of the following:
- Tutorial. This is a hands-on introduction to grammar writing in GF.
- Reference Manual. A full-scale reference manual of the GF language.
- RGL Tutorial
- RGL Synopsis. Documentation of the Resource Grammar Library, including the syntax API and lexical paradigms for each language.
- Shell Reference. Describes the commands available in the interactive GF shell. Also summarizes how to run GF as a batch compiler.
- Developers Guide. Detailed information about building and developing GF.