I believe you can use the Tk::Animation module. The manpage says:

use Tk::Animation
my $img = $widget->Animation('-format' => 'gif', -file => 'somefile.gi
+f');

$img->start_animation($period);
$img->stop_animation;
[download]

It continues with:

In the simple case when Animation is passed a GIF89 style
GIF with multiple 'frames', it will build an internal array
of Photo images.

Autark