I have also this problem. I can't set the origin of x-axis to zero. this is the code:

#!/usr/bin/perl -w
use strict;
use CGI;
use CGI::Carp qw(fatalsToBrowser warningsToBrowser);
use GD::Graph::area;
use GD::Graph::colour qw(hex2rgb);

print "Content-Type: image/png\n\n";

my @data = (
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
);

my @names = qw/sample21/;

for my $graph (GD::Graph::area->new)
{
my $name = shift @names;
#print STDERR "Processing $name\n";

$graph->set(
title => 'An Area Graph',
dclrs => ['green'],
#accentclr=>'red',
y_max_value => 10,
x_max_value => 10,
x_min_value=>0,
y_min_value=>0,
y_tick_number => 5,
x_tick_number => 5,
overwrite=>1,

#ticks_length=>,
#y_label_skip => 2,
#x_label_skip => 0,
x_tick_offset=>1,
#y_plot_values=>1,
#x_plot_values=>1,

#correct_width=>1,
#accent_treshold => 20,
transparent => 1
);

#$graph->set_legend( 'one', 'two' );
my $im = $graph->plot(\@data); 
print $im->png;
}
[download]

Can anyone help me on this please ?