Peripheral neuropathy related to gluten sensitivity can occur without any GI symptoms at all. It is also possible to have full blown celiac disease without any GI symptoms. Strange, but very true!

If you are curious about testing for this the antigliadin IgG and IgA tests are the best indicators of gluten sensitivity, although the anti-tTG test is the most specific for the intestinal damage of celiac disease. It would be good to have them all, along with a total IgA to rule out IgA deficiency.

This is one of the better articles.Gluten Sensitivity as a Neurological Illness
The full text is available for free, but you need to register.

I had some neuropathy symptoms related to a B12 deficiency, that reversed after treating the deficiency... a year before I realized my family had gluten sensitivity. So, I can't speak directly to your circumstance with a personal example. I did personally have a life time of nagging GI complaints.

You can find more info here:
The Neurological Manifestations of Gluten Sensitivity

Neuropathy

Cara