Biden has his own Climate Plan which is heavily inspired by the Green New Deal, but he does not explicitly support the Green New Deal.
The Green New Deal was introduced by Rep. Alexandria Ocasio-Cortez and Sen. Ed. Markey as a non-binding resolution in 2019, in an attempt to tackle two of the biggest crises facing the U.S.: the threat of climate change and income inequality. Although Biden has not officially endorsed the Green New Deal, his own climate plan called 'Biden Plan for a Clean Energy Revolution and Environmental Justice,' is heavily borrows from the Green New Deal, however the two are different in terms of size and scope, as noted by the Washington Post.
Biden's plan adopt many of the policies outlined in the Green New Deal. One of his campaign documents on his website states, "Biden believes the Green New Deal is a crucial framework for meeting the climate challenges we face." It is misleading to say Biden support Green New Deal, his plan borrows some of its policies and Biden said during the first presidential debate, “The Green New Deal is not my plan.”