The manual is in the file gManual.pdfh in Folder 01.  

It contains:

1-27: General description of method (can be skipped)

28-31: Description of kernels

32-39: Manual for operation of codes and input-output files

39-40: Manual how to prepare new tests for any kernel

41-47: Manual how to go through quick tutorials

Folder 01 contains code files
Folder 02 contains tutorials

 