First I only read about it in their blog, but today I checked. And although my fitness tracker (Xiaomi Band 8) doesn’t have GPS built-in, it can still get it from a compatible phone, like my Pixel 6a with OsmAnd+ installed. So now you can see the workouts which contain GPX data directly in Gadgetbridge, like here:

And, like also described on their blog, if you click the picture you’ll get it bigger and zoomable, like this:

And you get all of this *without* sending anything to either Google, or to Xiaomi, which is very cool indeed.
Our daughter “drowned” her Mi Band 8 in the Mediterranean – it doesn’t come back alive after being in salt water, so we ordered a 9 Pro for her, which has built-in GPS. Should be even easier then, either with the Mi App, or better – and like shown here – using Gadgetbridge. She has that on her phone already, just waiting for the device which should arrive soon.
So bravo to the Gadgetbridge team – you guys & girls are great! Thanks!
Also thank you for everyone who might be reading this. Like always.