\documentclass{article}
\usepackage{tikz-cd}
\usepackage{tikz}
\usetikzlibrary{calc}

\begin{document}
\begin{tikzcd}
    & G(A) \ar[r, hook, "G(ι)"] & G(X) \\
    & η^{*}(G(ι)) \ar[u, ""] \ar[r, hook, "η_{X}^{*}(G(ι))"] & F(X) \ar[u, "η_{X}"] \\
    F(A) \ar[uur, hook, "η_{A}"] \ar[ur, hook, "(η_{A}, F(ι))"] &&
  \end{tikzcd}
\end{document}


%%% Local Variables:
%%% mode: LaTeX
%%% TeX-master: t
%%% End: