I was 65 when I had my GCS surgery. If you are in good health, age is not a factor. They are more worried about BMI, as a measure of how hard your heart has to work, and smoking, which can increase all sorts of health risks. For someone in good health, there is no reason for someone to be denied surgery.
It took a couple of years for some of my surgical scars to soften up, during which time, I experienced a lot of pain. But the pain did go away once I started getting pelvic floor physiotherapy.