\documentclass[12pt, a4paper]{article}
\usepackage{luatextra}
\usepackage{palatino}
%\usepackage{tgtermes}

%usepackage{graphicx}
\usepackage{geometry}
\geometry{a4paper}
\usepackage{fullpage}

\usepackage[T1]{fontenc}
\usepackage[utf8]{luainputenc}
%\usepackage[latin9]{inputenc}

\usepackage{gregoriotex}
\usepackage{gregoriosyms}

%\pagestyle{empty}
\begin{document}

\begin{center}\begin{huge}\textsc{}\end{huge}\end{center}

\setspaceafterinitial{3.2mm plus 0em minus 0em}
\setspacebeforeinitial{3.2mm plus 0em minus 0em}

\def\greinitialformat#1{%
{\fontsize{43}{43}\selectfont #1}%
}

\gresetfirstlineaboveinitial{\small \textsc{\textbf{8. }}}{\small \textsc{\textbf{8. }}}
\commentary{{\small \emph{}}}
\setgrefactor{17}
\grespaceabovelines=5mm
\includescore{ite_V.tex}

\end{document}