Please see the attached link to the Town of Gilbert's website regarding fireworks on what is and what is not allowed. Also attached is Gilbert's website about the Centennial 4th of July Celebration.
https://www.gilbertaz.gov/departments/parks-and-recreation/special-events-and-permits/gilbert-s-july-4th-celebration
https://www.gilbertaz.gov/departments/fire-and-rescue/fire-prevention/consumer-fireworks