The gflags package contains a library that implements commandline flags processing.
To see what versions of gflags are available type
module avail gflags
To see what other modules are needed, what commands are available and how to get additional help type
module help gflags
To use gflags, include a command like this in your batch script or interactive session to load the gflagsmodule:
module load gflags
Be sure you also load any other modules needed, as listed by the
module help gflags command.