Desert Tortoises also have nuchal scutes, so it may also be a Desert Tortoise as others have said. I personally am just not able to ID it positively and say what it definitely is or is not (Greek or Desert) from the photo submitted.Sulcata have no nuchal scute. This one does have a nuchal. The Greeks do have nuchal scutes, so this one might be a Greek of one variety or another. Can't see it quite well enough to tell what it may be for sure, though.
Is this animal in a pet store?