This news is hardly unexpected given how the quest for the nomination has played out. Hawkins entered the race with an actual track record of running for high offices in New York State, and he is considered a co-founder of the Party. (Second-place candidate Dario Hunter has actually been elected to a school board in Youngstown, Ohio.) The Green New Deal on which Dr. Jill Stein ran in 2012 and 2016 started with Hawkins, whether or not he actually coined the term.
In case you haven't caught the news, Teamster activist Hawkins has selected long-haul truck driver and activist Angela N. Walker as his running mate. For those of you keeping identity politics scoresheets, Walker checks off not only the African American and Woman boxes, but also the LGBT+ box. An Armed Forces veteran like Hawkins, Walker also has electoral experience, including a run for sheriff of Milwaukee County (Wisconsin) in 2014. They have also both worked with Socialist Party USA, which has endorsed their ticket; Hawkins-Walker will likely appear on the ballot lines for SPUSA and GPUS in New York, which allows fusion candidacies.
On a personal note, I have donated to the Hawkins and Hunter campaigns, and I did not have a stated preference between them. My habit is never to presume anyone's nomination until it's signed, sealed, and delivered; I'm not happy about the way he has acted in public appearances as if his nomination was in the bag, appearing on programs such as Redacted Tonight VIP without more than an indirect reference to the other Green presidential candidates. However, I will be glad to be able to answer the inevitable question from the mis- and underinformed, "Who's your (y'all's) candidate?" without saying, "Well, the nomination hasn't been determined yet, and we have about six candidates contesting for it..." by which the asker has fallen asleep.