I have a 7 year old Gordon bitch. Usually they live for about 13 years, give or take 1 year.
By incontinent do you mean she has no control over her bladder or that she seems to have forgotten housetraining? If it is the first, then these sites are very helpful.
http://www.vetinfo4dogs.com/dincont.htmlhttp://www.katberard.com/hea_incontinence.htmIt also maybe that she may just have forgotten her housetraining. That can happen for any number of reasons, your girl may even be a little senile. My Gordon did that about a year ago, I just retrained her to go outside, like I would a puppy.
Any case take her to the vet for a check, better to be on the safe side.
Kate