Grill'd - Mt Lawley (and all round Australia)
Grill'd have awesome burgers, salads and chips, pretty much everything is gluten free except the regular buns and panini (but they have a gluten free bun) and the sweet chilli sauce. Check their FAQ's on the website for full info. It's all pretty healthy too.
Jus Burgers - Leederville & Subiaco
Jus Burgers do a gluten free bun (not as good as Grill'd though), and their burgers are pretty delicious. Unfortunately my favourite is the pumpkin burger which isn't GF. :(
Stones Pizza - North Perth
Stones are still my favourite GF pizza shop.
Little Caesars - Leederville & Mundaring
They have a great range of pizza toppings here, and really interesting and delicious combinations. Their GF pizza base is pretty damn good, and always made fresh daily.
Kassem's Pizza - Kewdale
Kassem's say they do a GF base, but to be honest I haven't tried it yet. I get these flyers in the mail because I live nearby.
Il Padrino Caffe - Northbridge
Il Padrino's is an Italian restaurant that has been around forever. They recently moved from William St to James St. They have gluten free pizza and beer on their menu, and when I walked past I noticed a sign on their window saying they have gluten free pasta.
Margherita's Pizza - Fremantle
In the Old Shanghai Foodcourt. Gluten free pizza bases available.
Fish & Chips
Carlisle Fish & Chips - Carlisle
All their fish is cooked in GF batter. There are some items on their menu which are not GF, but they'll tell you about them if you ask.