Although the planet could support life, no one alive today will see it. It's 20 light years from earth, meaning that the light from the planet takes 20 years to reach earth. To travel there would take hundreds of years using the best technologies currently available.
Gliese 581G is an exciting discovery. Many people have been buzzing about it for days, as it's really something novel.
Scientists will look at the new planet discovered like earth. Right now, it's not certain if it's made of rock, ice, or even mostly gas. There's no guarantee that this discovery in the elusive "Goldilocks zone" the New planet like earth Gliese 581g even supports life. Hopefully, we find out in my lifetime because I'd really like to know.