Please use the PUBLIC PART of your key to create an account. Your private key should never be sent anywhere!
To generate your key use a command: gpg2 --gen-key. Make sure to use RSA keys. To export one, use this: gpg2 --export --armor preferrably appended with a key name you provided during generation. You may also use a graphical program to manage keys, like KGpg.
GPG keeps your personal data and communications secure, even in an unlikely event when the servers get seized or hacked.