% arara: pdflatex
% arara: makeglossaries
% arara: pdflatex
\documentclass{article}

\usepackage{glossaries-extra}

\makeglossaries

\newglossaryentry{sample}{name={sample},description={an example}}

\begin{document}
Some \gls{sample} text.

\printglossaries
\glsadd[thevalue={S.2}]{sample}
\end{document}