_gsl_completions()
{
    local gslfiles cur
    gslfiles=$(ls -1 *.gsl 2>/dev/null)

    cur="${COMP_WORDS[COMP_CWORD]}"

    COMPREPLY=( $(compgen -W "$gslfiles" -- ${cur}) )
    return 0
}

complete -F _gsl_completions 'gsl'