gpg will stay for embedded and server usage, as it brings less dependencies and smaller binaries.
gpg2 is a redesigned version of gpg, but changes are mostly on internal level. The newer version is split into multiple modules, for example there are also modules for X.509 (used by S/MIME).
引用自 Are GnuPG 1 and GnuPG 2 compatible with each other?
"realname (realname's gpg) <[email protected]>"