Hope you had a nice trip. There are actually several places that deliver (Giordanos actually has a more varied menu as well). We've used Papa Johns, Dominos and Giordano's when we stay at OKW :
Pizza - Giordano's
12151 S Apopka-Vineland Rd
(407) 239-8900
Apopka-Vineland Rd
Domino's Pizza right near Crossroads
8542 Palm Parkway
Orlando, FL 32836
Phone: 407-239-1221
Pizza Hut-Lake Buena Vista
8699 Palm Pkwy
(407) 239-0205
Papa John's
5345 W Irlo Bronson Hwy
(407) 397-7272
Papa Johns
11989 S. Apopka Vineland Rd
Lake Buena Vista
407-477-7777
Delivers to ALL WDW Resorts except All Stars