The three, interchangeable Jeppesen aviation databases available for Garmin handhelds are the Atlantic International (Europe and Africa), Americas, and Pacific region, so the short answer is yes.
However, the underlying geographical database is concentrated for the area that the unit was originally purchased, i.e. if you bought it in the UK then it will display greater geographic detail for Europe than it will for the rest of the world. This cannot be altered.
I now stand to be corrected.
Regards, jez