\documentclass{article}

\usepackage{tikz}
\usepackage{tkz-graph}
\usepackage{xepersian}
\begin{document}

    \begin{tikzpicture}
       \node (a) at (0,0)
         {
\begin{tikzpicture}[scale=.6, transform shape]
\SetGraphUnit{2}
\GraphInit[vstyle=Classic]
\Vertex[Lpos=-90]{A}
\EA[Lpos=-90](A){B}
\NO[Lpos=0](B){C}
\NO[Lpos=0](A){D}
\Edge [style={thick, ->},
color=black](A)(B)
\Edge [style={thick, ->},
color=black](B)(C)
\Edge [style={bend right, thick, <- },
color=black](C)(A)
\Edge [style={thick, ->},
color=black](D)(B)
\end{tikzpicture}
         };
        \node (b) at (8,0) 
         {
\begin{tikzpicture}[scale=.6, transform shape]
\SetGraphUnit{2}
\GraphInit[vstyle=Classic]
\Vertex[Lpos=-90]{A}
\EA[Lpos=-90](A){B}
\NO[Lpos=0](B){C}
\NO[Lpos=0](A){D}
\Edge [style={thick, <-},
color=black](A)(B)
\Edge [style={thick, <-},
color=black](B)(C)
\Edge [style={bend right, thick, ->},
color=black](C)(A)
\Edge [style={thick, <-},
color=black](D)(B)
\end{tikzpicture}
         };
\node at (0,-1) {$G_1$};
\node at (8,-1) {$G_2$};
%\draw [<->] (a)--(b);
%\draw[->,>=latex] (a) to [out=30,in=150] (b);
\draw[->] (a) to [out=30,in=150] node[above,sloped] {برچسب} (b);
\end{tikzpicture}

\end{document}