It is imperative that newly assigned military members register their firearms with the Guam Police Department (GPD) within 30 days of arrival on island, and with the base Security Forces within 72 hours of moving on base.
For Guam registration, you will need to get a firearms-identification card from the Guam Police Department Records and ID Office in Tiyan. Begin the process as soon as you have your firearms from customs, as it can take several weeks. Failure to register with GPD can result in confiscation of your firearm, so don't delay.
For storing a firearm on base, you must register a firearm through your base security agency. Once the chain of command has approved this application, the weapon is registered on base.
NOTE: Failure to register your firearm with GPD can result in confiscation of your firearm. Any person who knowingly owns or possesses an unregistered firearm shall be punishable by imprisonment of not less than one (1) year and a fine of not less than One Thousand Dollars ($1,000).
To download the Firearm ID Permit Application and more FAQ's on gun registration with the Guam Police Department, click HERE
Guam Firearm Information