my $LIB = defined $ENV{LD_LIBRARY_PATH} ? $ENV{LD_LIBRARY_PATH} : "";
$ENV{LD_LIBRARY_PATH} = "/usr/local/lib:$LIB";

##</code><code>##

#!/bin/sh
LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH
exec /usr/local/bin/perl -x -S $0 ${1+"$@"} # -*-perl-*-
#!perl -w

use GD;
....