He was liable at the whim of an impersonal government to be blown anywhere about the world.
As a soldier Gatsby could be sent overseas at any given moment. This absence of control provides an insightful and intriguing view that contrasts Gatsby’s later apparent dominance over his life. This line references the kind of freedom and ‘floating’ exhibited by Daisy and Jordan upon Nick’s first introduction to the women; such a state of being able to be “blown anywhere” indicates that his social status is possibly impermanent or even faked.
To help improve the meaning of these lyrics, visit “The Great Gatsby (Chapter VIII)” by F. Scott Fitzgerald and leave a comment on the lyrics box