The GSA has declared that Google's product does have FISMA certification so (at least on this point) they are not lying.
By "US only" they mean North America (or possibly the Americas)
... which still may or may not help you (I'm Canadian and merged my account just fine).
An anonymous reader writes: Michael Geist reports that a newly study commissioned by the Government of Canada, which includes some of the most extensive surveying to date of the Canadian population on music purchasing habits, finds what many have long suspected — there is a positive correlation between peer-to-peer downloading and CD purchasing. The Impact of Music Downloads and P2P File-Sharing on the Purchase of Music: A Study For Industry Canada was conducted collaboratively by two professors from the University of London, Industry Canada, and Decima Research, who surveyed over 2,000 Canadians on their music downloading and purchasing habits.