Did you know? Gmail actually has two domains. They are gmail.com and googlemail.com. The latter was used primarily in Germany from the launch of Gmail up through some time in 2012. At first, the Gmail trademark was taken by somebody else in Germany. Looks like it may have also been an issue in the UK up until sometime in 2010.
Google does not otherwise use "localized" domains elsewhere. There are no Gmail users at the email domains gmail.ca, gmail.co.uk, or anything like that. Just gmail.com and googlemail.com.