I tried out Tk with GD somewhile back on linux, but ended up using a web server due to the access required. Here are a couple of snippets for you from my hacking around. I made this work by having GD output to a png file, and then with Tk presenting that file. The modules used were: Tk, Tk::PNG, and GD::Graph using the area format (GD::Graph::area). First making a graph with GD:

##### build a cpu graph...
$poop = 'CPU - Wait IO data from '.$startdate.' - '.$enddate;
# a fancy title for our graph
 
@data = (\@dateline, \@graphcpu_usr, \@graphcpu_sys, \@graphcpu_wio );
+ 
# this is an array of arrays. The first one is the X axis             
+                                                          

# which is the time, the others are the Y axis
 
my $data = GD::Graph::Data->new() or die GD::Graph::Data->error;
 
$data->copy_from(\@data);                                             
+ 

# this tells the graph to get the data from the data array
my $my_graph = new GD::Graph::area(400,300);                          
+ 

# and this says what type (area) and it's size
$my_graph->set(                                                       
+ 
# and set up all the particulars...
        r_margin => 1,
        x_label => 'Time',
        y_label => 'CPU Utilization',
        title => $poop,
        y_min_value => 0,
        y_tick_number => 8,
        y_label_skip => 1,
        x_ticks => 1,
        x_label_skip => $x_label_skip,
        x_labels_vertical => 1,
        x_label_position => 1/2,
        cumulate => 1,
        transparent => 1,
)or warn $my_graph->error;
 
open (IMG, ">dbcpu.png") or die "Can't open up the dpcpu graph file";
binmode IMG;
$my_graph->set( dclrs => [ qw(lgreen lblue lred) ] );                 
+ 
# here is the colors in the graph
$my_graph->set_legend("usr","sys","wio" );                            
+ 
# and the legend text
$my_graph->set_title_font(GD::Font->MediumBold);
print IMG $my_graph->plot($data)->png();                              
+ 
# and this plots the image out to a png format
close IMG;
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And here is where in TK the graph is displayed:

$fr = $mw->Frame(-relief => 'groove', 
                 -borderwidth => 5)->pack(
                  -side => 'left', 
                  -expand => 1 
                );
                                                            

# the canvas has scroll bars and we sized the viewable part at 625x800
$canvas = $fr->Scrolled('Canvas', -height => 625, 
                                  -width  =>800,)->pack(
                                  -side => 'right', 
                                  -expand => 1 
                       );
                                                              

# here we define the cpu graph and where we find it
$dbcpu = $canvas->Photo(-format => 'png', 
 -file => '/home/mjacobs/scripts/perl/dbcpu.png', 
 -palette => '16/16/16');
                                                               

# and this actually puts the image on the canvas
$dbcpu_gr = $canvas->createImage(300,250, 
       -image => $dbcpu, 
       -tags => "dbcpu", 
       -anchor => "center");
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