3DES over Galois Counter Mode (GCM) for authenticated encryption Is it possible to use DES or 3DES over Galois Counter Mode (GCM) to provide authenticated encryption?

I haven't seen any implementation yet.
According to Wikipedia, 


  GCM is defined for block ciphers with a block size of 128 bits.


So no, you can't use GCM with 3DES or DES, because of the 64-bit block size. You could use something similar to GCM, but it wouldn't be GCM.