Jorge Godoy <godoy@ieee.org> writes:

> Is there any effort or plan to make PGG compliant with RFC 2015 (cited
> in section 2.4 of RFC 2440) making it possible to sign messages with a
> MIME part?

PGG is just the OpenPGP interface, RFC 2015 (superseded by RFC 3156)
is implemented in Gnus on top of PGG -- this message is an example.
Is this sufficient?