\documentclass{article}
\usepackage{gchords}
\thispagestyle{empty}

\begin{document}

\def\numfrets{4}

\chords{ % print a row of chords
% fingers: n, x, o, p{n}, f{n}
% C chord: finger 3 pos. 3, finger 2 pos. 2, finger 1 pos. 1
\chord{t}{n,f3p3,f2p2,n,f1p1,n}{C}
\chord{t}{n,n,p2,p2,p1,n}{Am}
\chord{t}{x,n,n,p2,p3,p1}{Dm}
\chord{t3}{n,p2,n,p1,n,n}{G7 (ugly)}
{\tiny   % font size for string labels, t{X}
\chord{t}{t{E}n,t{A}n,t{D}n,t{G}n,t{B}n,t{e}n}
{std. tuning} }
}

\end{document}
