Because touchscreens are able to recognize the texture of human skin, it does not recognize something as coarse as nylon or GORE-TEX as a valid input. For this reason, some glove makers have included small rubber or vinyl pads on one or more of the fingers, because it allows it to be recognized by the touchscreen.
For the most part, if a glove features touchscreen functionality, then it will be advertised as such, because it tends to be a popular selling point.