Intelligence Gathering Act of 2002 - Requires the Department of Homeland Security to study and report to Congress on the following issues semi-annually for five years following enactment of the National Homeland Security and Combating Terrorism Act of 2002: (1) Department policies and procedures for obtaining and sharing relevant information from the Federal Government and State and local law enforcement agencies; (2) rules and practices developed between the Department and other Federal, State, and local government agencies; (3) the nature and type of information shared and related to law enforcement, intelligence, and homeland security; (4) agencies that have received such information; (5) a summary of specified items, such as wire-tap transcripts and search warrants, received from the Federal Bureau of Investigation (FBI); (6) the nature of information follow-up requests made by the Department; (7) the nature of follow-up requests made to the FBI; (8) efforts made by the Department and the FBI to improve interdepartmental communication; (9) the general nature of investigations conducted by Department analysts and similar analyses performed by the FBI; and (10) the method of transmission (mail, computer, or messenger) of all information provided to the Department.