Default GPG Encryption Algorithm (symmetric cipher) is?

[frankexchange at nospammail.net]

Deja Dup on Ubuntu 10.04 LTS: Default GPG Encryption Algorithm
(symmetric cipher) is?

I am using Deja Dup <https://launchpad.net/deja-dup> to create encrypted
backups before uploading online. It uses GPG's default Symmetric Cipher
(Encryption Algorithm) to encrypt data. 

Does anyone know exactly which default symmetric Cipher (Encryption
Algorithm) is used by GPG? Apparently it is CAST-128, but I cannot find
any citation online that confirms this is the case for the version of
GPG integrated into Ubuntu 10.04 LTS OS.

CAST-128
https://secure.wikimedia.org/wikipedia/en/wiki/CAST-128

I am a newbie to Ubuntu/Linux. so struggle to get my head around command
line/Terminal techniques, as such does anyone know if a GUI has been
created that enable the settings and options to be viewed or changed on
Ubuntu 10.04 LTS?


Thanks
Frank