I like Greta better, but if you like it, why not? It's not common and ppl will be able to spell it. What does it mean?
It means pearl (which happens to be my birthstone )

What about Greer? I think that is s classic that goes through the ages from little lassie to graceful old lady.
I came across this today when looking at Scottish names. It makes me think of Germaine and doesn't go well with our surname anyway.

It won't be soo popular that you'll have to have a DD put her last initial on all her work I actually like it. I can work out how to pronounce it from the spelling and I can spell it - big things for me as a teacher
It's good to get the stamp of approval from a teacher. MIL is one too.