General Services Administration Portfolio Enhancement Act of 2008 - Directs the Administrator of General Services (GSA) to convey to the National Women's History Museum, Inc. (the Museum) the northern part of specified property in the District of Columbia, which the Administrator and the Museum deem appropriate for a museum facility.
Grants the Administrator the authority to convey the southern part of such property to the Museum.
Requires the Administrator to enter into an agreement with the Museum for the conveyance.
Permits separate conveyance of the northern and southern parts.
Requires the northern part to be dedicated for use as a site for a national women's history museum for a 99-year period and allows the southern part to be used for any purposes permitted by applicable laws and regulations.