Pathfinder gnomes seem to be kinda skinny and fairy-like in their proportions, as opposed to dwarves and halflings that are generally thicker.
My thoughts are that if you want to differentiate gnomes from these other creatures, I would accentuate their more lithe nature. What you have shown so far, their bodies are much thicker than I would expect.
That being said, congrats on getting these products out. Ive been toying with the idea of putting out some paper minis myself, but just cant seem to get my lazy end past the drawing stage.