Aw, I'm so sorry. Poor Gypsy.
This happened to one of my dogs, a shepherd/husky mix when she was around 8 or so. It was a full tear, and she did have the surgery and it went well. The hardest part was the separation, they kept her overnight. She was an abused, late in life rescue, and really bonded to us, and didn't trust people. So we paid the vet tech $100 to stay with her overnight because they wouldn't let me stay there with her. I was afraid she would think we abandoned her. The only issue is the day we brought her home, she had a little problem with urinary incontinence, that she had the rest of her life. I always wondered if it was a side effect of the anesthesia, or maybe it was her age and would have happened anyway. She was a wonderful and sensitive dog.
I've also torn an ACL, it was very painful when it happened but not after a week or so. But I would fall without warning and I could feel the two bones hitting together, which was an eerie feeling. I had the surgery as well and walk normally. I also had 6 months of PT which the dog didn't need.
I was amazed that she wanted to run in a weeks time. I wasn't allowed to do that for 6 months.
They really do heal so much faster than us. That was years ago, and she is gone now. So, I imagine they are doing even less invasive surgeries now.
My best wishes to you and Gypsy.