Keith,
I'm sorry to hear about the significant neuropathy you are experiencing. Although it isn't a common symptom from the gemcitabine, it has been reported. I personally haven't seen a patient have significant side effects of neuropathy.
One thing to consider is if there is a second factor complicating the neuropathy. I don't know if you have a long history of diabetes, but that can cause neuropathy and certainly the chemo could have exaccerbated it. Also, some oral drugs could be making it worse too.
What I would advise is to have your local doctor send you to either a neurologist or pain specialist (neurologist preferred). They will be able to look through your medications, etc and discontinue the ones that might be hurting you more. They might also consider trying a couple medications to try to help the neuropathy.
Heather