[jdh]

Unfortunately, this isn't possible right now due to the way that GMail handles URLs between the mobile version and the full desktop version. I've also been trying to get this working for a while without any success, and after deconstructing the URLs and looking at them in more detail, I'm pretty sure it can't be done unless Google changes things on their end.

(I have made several requests in their forums for them to do so, but nobody has ever replied).