Weigh the gluten free flours out. See note below* for approximate cup measurements, if you don't have a scale.
Add to the bowl of a stand mixer: tapioca flour, cassava flour, Bob's 1 to 1 Gluten Free Flour, brown rice flour, xanthan gum, salt, and yeast. Mix on medium low for 1 minute, using the paddle attachment.
Pour in the water and mix for 2 minutes on medium high. Add the olive oil and mix for 1 more minute. The dough should come together most of the way.
Cut 3, 8" squares of parchment and spray each with a little oil (or drizzle with oil). Divide the dough, scooping or using a spatula, between the three pieces of parchment, until you have three equal weights of dough. Using your fingertips foll each insto a dough ball on the parchment, without picking it up.
Drizzle EVOO over each and rub lightly to coat. Set on a baking tray. Cover the tray with cellophane. Seal in a large freezer bag (or cover with another layer of cellophane). Refrigerate for 5-7 hours (or up to 24 hours).
Set each dough ball on a board to bring to room temperature 1-1½ hours prior to baking. Flour a board with cassava flour. After the dough has come to room temperature, Invert one dough ball onto the board and remove the parchment.
Flatten to 10" by patting gently and making an edge on the outside of the dough. Slide the dough onto a cornmeal dusted pizza peel or clean board. Drizzle with olive oil. Add a scant 1/4 cup of pizza sauce and spread across, leaving the edge without. Top lightly with cheese and toppings.
Slide onto the stone of your pizza oven. Bake at 650-700 to start in pizza oven. 2-2½ min. Or if using a conventional oven to bake, set the oven to 525℉ or as high as it goes, if it doesn't go to 525. Set a pizza stone or cast iron in the oven to preheat. Once the oven is preheated, sprinkle with a small amount of cornmeal just before sliding the pizza onto the stone. Bake at 525 for 14-20 min or until the cheese and crust are golden brown. See note below **.