You can try from the command line GPA & (GNU Privacy Assistant), under the Keyring Editor tab you should see details: "The key has a both a public and private part." After generating your key, you should have backed up both your private and public keys to some external storage media (CD-ROM, USB), otherwise one day you will not be able to recover your files. You do not want to export your private key to a key server or share with anyone else for that matter. If both are present you should be able to run 'gpg --decrypt-files' and see a prompt for your passphrase. In some cases you can also have the passphrase cached, so you don't have to type it every time, but you should disable this option if you share your computer with anyone else.