Junction I also suffer from this & have found that hand hotties down the back of your gloves help ... they are small sachets & once shook to get warm will stay that way for hours, a lot longer than gell,
I find that the cold from the air I am riding into causes hell to the top of my hand, so push them down to my knuckles in my gloves & find the heat radiating out keeps my fingers warm, I also have the foot ones for inside your boots for toes.
Failing that if you really suffer you can (as I do) take tablets in the winter months which will help speed up your circulation. See your Dr about that