\documentclass{article}
\usepackage{makeidx}
\makeindex
\usepackage[colorlinks=true]{hyperref}
\usepackage{xepersian} 
\begin{document}
مقداری 
\index{متن@\hypertarget{متن.ind}{}متن}\href{\#متن.ind}{متن}
%\index{gnus!good@\hypertarget{gnusgood.ind}{}good}\href{\#gnusgood.ind}{good} ...
\printindex
\end{document}