1000megs != 1 gig

1024 megs == 1 gig
Actually, you're thinking of a gibibyte. The SI unit of a gigabyte is 10^9 bytes.
http://en.wikipedia.org/wiki/Gigabyte

Several privacy advocacy groups are making a stink about this
Google's Gmail sparks privacy row
However, its terms of use acknowledge that "residual copies of email may remain on our systems, even after you have deleted them from your mailbox or after the termination of your account".