Four songs have been released on the EP, which is called "Einár".
The fourth track, "Check me in the eyes", has also received a music video made by Kristian Söderström, in which relatives of the rapper participate.
Mom producer
Einár's mother Lena Nilsson, who is the producer of the video, writes on Instagram that her son wrote the song "as a tribute to the love and security you should feel with your own".
Nils' concern for the small and weak will continue and it will be passed on by all of us who know how strongly he felt for the rights and value of young people.
What the work with this will look like and in what form it will take place, there will be more information in the near future ", she writes.
Breakthrough as a 16-year-old
Einár was shot several times at close range in Hammarby lake town in Stockholm on 21 October.
He was 19 years old.
Grönberg broke through as a 16-year-old and quickly became one of the biggest names in Swedish rap.
Via social media, he built up a large audience, had millions of listens on Spotify and he was rewarded at both the Grammy Gala and the P3 Gold Gala.
Like many other of the country's most famous rappers, he had connections to gang criminal environments.
During the breakthrough year 2019, he partly lived in an HVB home and referred to weapons and drugs in his texts.