I cannot address lung cancer, but I can tell you that ground glass is a term used to describe the appearance of abnormal findings in lung images. This can be from many causes, only one of which is cancer. The term has come to be ominous these past two years, as in early days of Covid it was used to describe the lung abnormalities from Covid pneumonia. Those of us with other chronic lung infections sometimes see the description in our xray results when the infection is active, and it recedes after treatment.
I know lung nodules and other findings are scary, but you need not be overly anxious about the ground glass description.

I always like to encourage people who are awaiting a visit for a new medical issue to avoid using Google to guess their diagnosis. It is just too scary.

Do you have a trusted family member, friend or clergy person who you can talk to about your worries?
Sue