I'm filing this as a faeture request because I do not know if some standard requests the GPG keys are for ASCII 7-bit character set only.
When I create a key for my e-mail address with "gpg --generate-key", I'm asked for my name. In my shell and throughout my GUI, I use UTF-8 character set. Thus I write my name with german umlauts. This is not reflected in the key, since it uses ASCII only.