Depends on the variety of gb. Do you know? Was it from me?
If you feel the berry, it will be very hard if it is not ripe/ready. They ripen over an extended period of time, so when there is some "give" to the berry, it is edible, likely tart, until it fully ripens. At that stage, you can eat them and many people harvest for cooking. When perfectly ripe, the berries will fall into your hand when you touch them, but at that stage its easy to lose the crop with mistiming. Like semps, appearance will depend somewhat on environment. Takes some sun to make the berries color up.
