You have generated a new GnuPG key, and you want to make your public key available to others via a keyserver.
Send the key to the keyserver:
$ gpg --keyserver server_name_or_IP_address --send-keys key_ID
Some well-known PGP/GnuPG keyservers are:
Additionally, most keyservers have a web-based interface for adding and locating keys.
A keyserver is a resource for storing and retrieving public keys, often accessible via the Web. Most widely-used GnuPG keyservers share keys automatically amongst themselves, so it is not necessary to send your key to all of them. Your key should be available on many keyservers within a day or two.
gpg(1), and the keyservers mentioned herein.