Enable Gigabit Interfaces on Cisco ASA5510-SEC-BUN-K9

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According to the product description on Cisco’s site ( http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/product_data_sheet0900aecd802930c5.html ) The ASA5510 with the security plus license has two gigabit interfaces and three fast ethernet interfaces (including the management interface). When I view the interfaces on this device though I only see the 5 fast ethernet interfaces. Am I doing something wrong or is the site incorrect?