How long has it been on there? It's possible the adhesive has deteriorated and prying would pop it loose, but you'd want to pry from all possible spots that you could, had good luck with glass doing this, but not the same. I think if you could cut the drywall around it and just take the drywall with it and remove the drywall after would be less chance of breaking it. Just my .02.
To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault