\documentclass[]{article}
\usepackage{gcheck}

\usepackage[compat2,twosideshift=10pt, marginpar=50pt,
            dvips, showframe]{geometry}
\geometry{twosideshift=8pt}

\begin{document}

\typeout{}
\dcheck\paperwidth{614.295pt}
\dcheck\paperheight{794.96999pt}
\dcheck\textwidth{430.43787pt}
\dcheck\textheight{648.46812pt}
\dcheck\oddsidemargin{-2.84143pt}
\dcheck\evensidemargin{42.15858pt}
\dcheck\topmargin{-32.51906pt}
\dcheck\headheight{12pt}
\dcheck\headsep{25.0pt}
\dcheck\footskip{30pt}
\dcheck\marginparwidth{50pt}
\dcheck\marginparsep{11pt}
\dcheck\columnsep{10pt}
\dcheck\hoffset{0pt}
\dcheck\voffset{0pt}
\ccheck\mag{1000}
\checkresults
\typeout{}

\manyfoxes\manyfoxes\manyfoxes\manyfoxes
\manyfoxes\manyfoxes\manyfoxes\manyfoxes
\end{document}
