Gluten-free review:
The vast majority of items on the menu here can be made gluten-free and my go-to ones are the Chef Nuit Pad Thai or the Gaeng Masaman. Both are super delicious. Make sure you specify you need your item to be gluten-free though because most aren't normally gluten free. I also recommend getting the thai iced tea if you like the taste of roasted tea.
As for cross contamination, I am not sure how everything is prepared in the kitchen as I didn't ask. I have a moderate intolerance and do not have celiac's disease, however in the numerous times I've been here I've never had a reaction to the food.
TL;DR most options can be made gluten-free; thai iced tea is yum