In 2004, Gregg aka Kolombo produced many electro house EPs under the name «LouLou Players», with co‑producer Djerom and vocalist Lotus, which came out on Sharam Jey's label, King Kong. Thanks to high sales, LouLou Players have also remixed many tracks for labels like Darren Emerson, Fatphaze, Dahlback & Ekenback, John Acquaviva, Remo feat Cheleonis R Jones, ...

He carried on building on his success, and in 2005, again with Fabrice, he founded an independent electro label supported by Audiopolis Distribution. Called LouLou Records, Gregg uses the label to put out his tracks, with the artist name Kolombo, his new solo project.

Kolombo allows himself to put out a wider variety of sounds, from dark electro to minimal, while keeping his electro house feel throughout. He's currently signing many tracks and remixes on labels like Strobe Music, Lektroklash, Color, Blu‑Fin, Jackmoves, Dirty Dancing, Kitt Ball, Surprise, Artminimal and many more.

Since September 2006, Kolombo has joined Mugwump: a project where he produced music in collaboration with Geoffroy and Compuphonic. At the same time, he is managing to create a new record label with Marc Romboy from Systematic call «Vice versa Recordings».