that’s right, the GPS data is automatically embedded into the EXIF data of the image (can be turned off) — but unfortunately, when you use third party camera apps, no EXIF data at all is added to the images. I think it’s an (intentional?) limitation of the relevant APIs…

Now that’s a bit of shame, because EXIF data is nice to have, and there are much better camera apps than the standard one. For instance “Camera Genuis”, which adds features like timer delay, (digital) zoom, bigger release button (the normal one is quite small and hard to hit when you take extended-arm self portraits), burst shooting, and by far the most useful: Image stabilisation (quite clever, using the accelerometers it takes the picture when you are shaking the least, which works surprisingly well!!).