Can I replace the glass screen and how?

"There's a tear down guide here on ifixit . Looking at that I would say its a fused unite not meant to be replaced .

Samsung Gear 2 Teardown

However it can be done and there is a site that sells the screen

https://www.youtube.com/watch?v=sOUoVGD2...

Look here and give it a try. Its good replacement video"