I think it's pretty common as a first name. There's been at least one at every school I've gone to, sometimes more. Usually
Grace but I know I've met at least ne Grayce. I've never met one that goes by
Gracie, so I think it's easy to avoid.
I like it on other people but I wouldn't use it myself. It's common, but for me it doesn't have any bad associations from being a popular name.