[1] His song Biću tu from the 1996 album Gru 2, gained him popularity in Eastern Europe, as well as the 2010 release I dalje me žele alongside Serbian rapper Ajs Nigrutin.

[6] A native of Dimitrovgrad, Andonov started his career in Belgrade, with his earliest demos in 1994, but rose to prominence with his music work in early 1996.

[7][6] The albums included critically and commercially acclaimed songs that topped the Balkan charts, including Srce, Biću tu, Kad se popnem na binu, Kiša, and Da li imaš pravo?, winning him three Serbian Oscars of Popularity, an Indexi Award and a World Music Award.

[9][10] Andonov also had done work for television and film, including appearances in Operacija trijumf, Veliki Brat VIP All Stars and Tvoje lice zvuči poznato.

[1] In 1988, his cousin living in Sweden gave him a Straight Outta Compton album by N.W.A., which he cites as his most important possession from his earlier years.

His first demo recording as a vocal soloist was produced in 1994, although his first public releases date back to 1995, with the album Da li imaš pravo?

These include Leto (Summer), with Leontina Vukomanović and U-Stuff, Srce (Heart) with Leontina Vukomanović and Nenad Jovanović, Dosta mi je svega/Poludecu (I'm Done With Everything/I'm Going Crazy) with Srđan Babović and Dejan Ivanković, Čovek je čoveku vuk (A Man is a Man's Wolf) with CYA and ILaLa, Petak (Friday) with Bojan Todorov and Coca, and Biću tu with Niggor of the Monteniggers.

All songs featured lyrics and music arranged by Andonov, with guitar playing done by Voja Aralica, and co-writing done by Dejan Ivanković Betoven, who was a guest vocalist on Dosta mi je svega/Poludecu.

[7] In 1999, he helped produce the Full Moon and Monteniggers single Ja se vraćam u svoj hram which his chorus melody is the foundation for the song Samo sex Srbina spasava.

In 2000, Metropolis Records published a rendition of his debut album Da li imaš pravo 5 years after the original issue, on CD.

Songs Doktore and Tamo gde si ti featured guest vocals from Mario Jovanović from the band Rhythm Attack and from Bane Danilović from Who Is The Best.

He provided the voice for Anchor for the Serbian Finding Nemo,[11][26] starring Branislav Platiša and Anica Dobra and acted in the documentary Poslednja Nova Godina that same year.

[27] Adrenaline Junkie and Nebo ispod zemlje were published as renditions due to the refreshed motives of RnB and Swing music.

[28] He also took part in the seventh gala for Operacija trijumf, alongside Croatian musician Dado Topić, American pop artist Anastacia, and Macedonian vocalist Kaliopi on 10 November.

At the time, when the four artists formed the seventh gala, Mirjana Kostić and Kristijan Jovanov were expelled, while contestants Adnan Babajić and Milica Majstorović were nominated.

[34][35] In 2011, he produced Idemo na sve by Serbian singer Ana Kokić and Romanian recording artist Costi Ioniță, which went on to top the charts in December 2011.

[42] In late 2013, it was revealed that Andonov collaborated with Marchelo and his crew on a new book-album titled Napet Šou (Tense Show), which was published in October 2014.

[49][50] In 2015, Gru was featured on the single Novo leto alongside Belgrade-based hip hop project Kurtoazija, fronted by vocalist MC Stojan.

Unlike the original which incorporated elements of old-school funk, the 2015 release blended the worlds of hip-hop and turbo-folk and pop music in order to appeal to modern listeners.

In January 2019, Gru had taken part in the Abarth VIP race by Petrol, alongside various Serbian media personalities, including Dragana Mićalović, Hristina Popović and Sara Jovanović.

[citation needed] Though he did not shine in the area of vocal style,[62] being a baritone, he excelled in the field of musicianship,[18][63] either as a music producer and as a multi-instrumentalist, and in the art of rapping.

This can be attributed to most of his songs, most notably Biću tu, I dalje me žele, Kad se popnem na binu, Putnik and Ozbiljna veza.

[68] Andonov is known for his specific[64] brand of lyrics, approaching a wide palette of themes, including Srce, which explores love, Beograd, interpreting social status, Kad se popnem na binu, elucidating fears, Biću tu, translating his feelings about hedonistic aspects of love, and Geto, which paraphrased the topic of crime.

[71] Andonov is one of the pioneers of Serbian rap music, and remains a prominent figure in the Serbian rap scene, being a main source of inspiration to the aspiring rappers in Eastern Europe, including Ajs Nigrutin; who chose the stage name Nigrutin based on Gru;[72] Liroy, Wikluh Sky,[73] Marchelo,[74] Don Trialeon, MC Yankoo,[75][76] Rasta[77] and Juice.

Other artists including Ana Nikolić, Coolio, Rambo Amadeus[78] and Almir Hasanbegović of Dubioza Kolektiv[79][80][81][82][83] have often cited Gru as an influence.

It was directed by Marchelo, and filmed in Belgrade, Sarajevo and Zagreb, featuring eminent rappers from the region, including Edo Maajka, Sky Wikluh, Timbe, Ajs Nigrutin, Juice and various others.

It is assumed that the kite's handle hit him in the head, after which he lost consciousness and dropped into the water; the ambulance came quickly, but they could only declare him dead at around 3:20 pm.

[12] Numerous prominent artists, including Radovan Vujović, Sergej Trifunović, Frenkie, Sky Wikluh, Nikola Rokvić and Nered expressed sorrow over Andonov's death.

[100] At the 2020 Music Awards Ceremony in Serbia, over a dozen artists, including Ivana Peters and Tijana Dapčević performed Biću tu, as a tribute.

[101][102][103] On 14 July 2020, Andonov's family and close friends conceived a tribute to the late musician Gru tu je, taking control over his Instagram and other social media outlets and releasing merchandise in his honour.