Can Gravity Forms replicate this custom functionality?

Existing static html site: http://www.maidtoclean.com/
Site is being rebuilt in WordPress.

Note the form in the right sidebar... "Do we clean in your area?"
While this is a simple form, it calls a zipcodes.pl file which lists dozens zipcodes and their conditional statements. First 20 lines of code is below -
Can you replicate this kind of form and conditional result statements?

sub checkzipcode
{
if (($zipcode eq '20007') ||
($zipcode eq '20008') ||
($zipcode eq '20015') ||
($zipcode eq '20016') ||
($zipcode eq '20812') ||
($zipcode eq '20816') ||
($zipcode eq '20057') ||
($zipcode eq '21818'))
{print "Yes, we do clean in your area. We provide recurring service in your area on Mondays. All other cleaning service is requested according to your needs. We would be happy to handle your request for service.\n";}
elsif
(($zipcode eq '20001') ||
($zipcode eq '20004') ||
($zipcode eq '20005') ||
($zipcode eq '20009') ||
($zipcode eq '20036') ||
($zipcode eq '20037') ||
($zipcode eq '20737') ||
{print "Yes, we do clean in your area. We provide recurring service in your area on Tuesdays. All other cleaning service is requested according to your needs. We would be happy to handle your request for service.\n";}
else
{print "We're sorry, but we do not clean in your area at this time.

Please contact us to inquire if we can make special arrangements to clean for you.\n";}
}