What is the name of the first Apple watch to have built-in GPS?

The first Apple Watch to have built-in GPS was the Apple Watch Series 2.

Apple announced the Series 2 in September 2016, giving the smartwatch a GPS receiver that could record outdoor distance, pace, and speed without relying on a nearby iPhone. That made it especially useful for runners, cyclists, and walkers who wanted to leave their phone behind while exercising.

The Series 2 also brought several related upgrades, including water resistance rated to 50 meters, a display twice as bright as the first-generation model, and a dual-core processor. Apple positioned it as a fitness-focused improvement rather than merely a faster version of the original watch.

The naming can cause confusion because Apple later sold both Series 1 and Series 2 models as second-generation products. Series 1 used a faster processor but did not include GPS; its S1P system was essentially a GPS-less variant. The original 2015 Apple Watch, often informally called Series 0, also depended on the paired iPhone for location data.