GnuPG supports a command-line option --armor that that causes output to be generated in an ASCII-armored format similar to uuencoded documents rather than binary format.
$ gpg --export -a KEY_ID
$ gpg --export-secret-keys -a KEY_ID
-----BEGIN PGP PUBLIC KEY BLOCK-----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=2pJ8
-----END PGP PUBLIC KEY BLOCK-----
-----BEGIN PGP PUBLIC KEY BLOCK-----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=2pJ8
-----END PGP PUBLIC KEY BLOCK-----