Flour your work-surface with gluten-free flour or starch.
TIP: The original recipe suggests to prevent the dough from sticking to your fingers, flour your hands. My tip is the opposite: I fill a large bowl with water and keep my hands wet while handling the dough. See which works best for you.
Take the amount of dough that you wish to use out of the bowl/container. You will probably need a spatula or dough scraper as the dough is more sticky than gluten dough.
De-gas the dough by forming the dough into a ball in your hands. Flatten the dough on the work-surface and fold over, sealing the join. Flatten the dough again, and fold over again sealing the join. Each time you do this, your dough is going longer, in fact baguette shaped. Repeat if necessary to get the right length and thickness.
When you have the right thickness of baguette then roll the baguette gently over your floured work surface to make it rounder. If there is any trace of a join in your dough then this should be underneath.
Line a baking tray with baking paper and dust with flour. Transfer the baguette on to it (the dough scraper under a section and your hand). Place a damp (not wet) tea-towel over the baguettes. Leave to rest again for at least 45 minutes.
If, after proofing, the dough has risen but the shape to have spread outwards and seems flat, gently use the dough scraper to roll the dough a little to make the baguette narrower and rounder.