encryption – Any reason why SHA-3 isn’t yet present in GnuPG?

I was curious about setting SHA-3 as the preferred hashing algorithm for GPG but that looks like it is not yet supported and the documentation states this:

SHA-3: SHA-3 is a completely new hash algorithm that makes a clean
break with the previous SHAs. It is believed to be safe, with no
warnings about its usage. It hasn’t yet been officially introduced
into the OpenPGP standard, and for that reason GnuPG doesn’t support
it. However, SHA-3 will probably be incorporated into the spec, and
GnuPG will support it as soon as it does.

What does this mean: “…and GnuPG will support it as soon as it does”?

Are there any development plans for supporting SHA3 or BLAKE?