Apple watch

Can you make calls on your gps plus cellular watch with out your iphone being near

Yes, according to: Set up cellular on your Apple Watch - Apple Support

"Your Apple Watch with cellular will automatically switch to the most power-efficient wireless available: It can connect to your iPhone when itʼs nearby, a Wi-Fi network, or cellular. When your watch connects to cellular, it uses LTE networks. If LTE isn't available, your watch will try to connect to UMTS if your carrier supports it. 

When your watch connects to a cellular network, you can check the signal strength from Control Center or the Explorer watch face. To open Control Center, touch and hold the bottom of the screen, then swipe up."

"Learn what your Apple Watch can do while connected to Wi-Fi or cellular, even when your iPhone isn't nearby."

Yes! You must first have a LTE Cellular Service Plan connected to the device before being able to go ahead and use that service.