bash-$ cat my.cgi
#!/usr/bin/perl
use strict;
use warnings;
use CGI::Lite ();

my $cgi = CGI::Lite->new;
$cgi->parse_form_data;
print "Content-type: text/plain\n\n";
$cgi->print_form_data;
bash-$ export REQUEST_METHOD=GET
bash-$ export QUERY_STRING='foo=bar&baz=quux'
bash-$ ./my.cgi 
Content-type: text/plain

foo = bar
baz = quux