7 GCA § 3107: Jurisdiction of the Supreme Court.

(a) Jurisdiction. The Supreme Court shall have authority to review all justiciable controversies and proceedings, regardless of subject matter or amount involved.

(b) Additional Authority. Its authority also includes jurisdiction of original proceedings for mandamus, prohibition, injunction, and similar remedies to protect its appellate jurisdiction. The Supreme Court shall have jurisdiction of all appeals arising from judgments, final decrees, or final orders of the Superior Court in criminal cases and in civil cases and proceedings. The Supreme Court has original and appellate jurisdiction over attorney disciplinary matters including but not limited to admissions, qualifications, and standards of practice; and supervisory jurisdiction over all inferior courts in Guam and may make and promulgate rules governing the practice and procedure in the courts. This does not include administrative authority otherwise specifically prescribed in § 5102 of this Act.