The AS100V has GPS as does the AS30V - most of the other Sony action cams don't (AS15, AS20). Assuming you have a GPS-capable model, and the GPS is enabled in the camera setup, it'll take the coordinates while it's recording and then you use the free Sony software (Action Cam Movie Creator + PlayMemories Home -- though you only need Action Cam Movie Creator) to put in the overlays. You can only select 3 or 4 different overlays, so not a lot of options, but it's a neat feature I suppose. This was my first time using it.