Does the Apple Watch work with metroPCS?

MetroPCS is not listed

The Cellular Apple Watch shares the iPhone's phone number.  This requires the iPhone cellular carrier to support the Apple Watch.  The iPhone carrier charges a monthly fee for this service.  In the U.S. the fee is $10 per month added to your iPhone bill.

iPhone Cellular Carriers that support the Apple Watch, which models, the radio frequencies each model uses, and the country where they offer service:

https://www.apple.com/watch/cellular

The GPS only Apple Watch can do  Everything  the cellular model can do  as long as  your iPhone is  nearby, where nearby is somewhere in the same 3-4 bedroom home (assuming typical wood frame construction). 

https://support.apple.com/en-us/HT205547

The Cellular Apple Watch allows you to leave your iPhone at home while you go for a walk, run, bike ride, etc...

Apple doesn’t list MetroPCS.

Ask MetroPCS direct.y about cellular+GPS coverage.

Or for using the watch without cellular, you can use a cellular+GPS without a contract. Or can use a GPS-only watch.