Google Gmail testing PGP!
Google Operating System has reporting that Google seems to be testing PGP Signature Verification in their webmail service Gmail.
A Gmail user noticed this feature for a while which means it is currently under testing.
User gets the option to verify signature in case the email message contains the relevant data.
Sources say [...]

Gracion Enclose sends large files to any recipient without email attachment limitations, by uploading a file and creating an linked email in one step. Public beta release 1.0b6 adds support for automatic encryption via PGP Desktop. Enclose combines managed uploading, zip packaging, email notification, and now public key lookup and encryption in a simple 3-step [...]