Immature GBB 1 - Boy or Girl
It's about 1.5" and molted about 2 weeks ago. I see a flap around the upper book lungs. Female or early wishful thinking?
You won't see a flap when ventral sexing (the flap is located on the interior of the exuvia between the first pair of book lungs), what you're looking for is either a "hairy dot" (gonopore) for males or "lips" (gonoslit) for females.
That said, I want to guess female, there are no obvious "lips" but the first pair of book lungs are far apart and angled, this is a tricky species to sex this way so don't take my word for it, you're better off waiting for a moult to confirm 100%.
It's difficult to tell with this picture. Maybe if you could get a picture of it on bare glass because that web makes it difficult to see.

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Epiandrous fusillae sexing (Not Molts)
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Lil Paws
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