I also suggest City Super supermarket. Their selection of gluten free foods is low, but I haven't really been able to find other places with much. They have gluten free muesli and a Australian stuff. I purchased. They also have gluten free cake mix I think. A few things, not much. Read the tags, they will say Gluten free if it is. People in HK don't really understand the condition.... its kind of a pain. Hope this helps.
I think this news is amazing... As a newly diagnosed celiac, I am keeping my fingers crossed in regards to this research. Think about what this would mean to celiacs as a community.