Does Apple Watch Series 8 comes with both GPS and LTE?x

The #A2771 model number corresponds to a GPS only Apple Watch. It has no LTE support.

The models with LTE support are A2772 (41mm North America), A2773 (41mm Europe & Asia Pacific) and A2774 (45mm North America), A2775 (Europe & Asia Pacific) and A2857 and A2858 (41 and 45mm China mainland).

Click here ➜ Identify your Apple Watch - Apple Support

According to what I read on the Internet, it is a GPS only.

If you have this Apple Watch, then you can check the Digital Crown. If it has a Red Ring ⭕️, then it is cellular. No Red Ring, means it is GPS only.