Gilbert Trefzger  was born in 1974 from an egyptian mother and a swiss father. He started playing guitar at the age of nine. He studied guitar at the Jazz Departement of the Conservatory in Basel and in Paris.
He is a diverse instrumentalist and covers many styles of music, playing guitar, steelguitar, aoud (arabic luth) and banjo.
He is also a composer and is currently co-writing on the musical project OKOU with singer Tatiana Heintz.
His versatility and creative approach has led him to work and play with different artists, collaborate on movie soundtracks and also write music for theatre and films. He lives in Basel, Berlin, Paris.

the Okou debut album "Serpentine" is released in France (AZ/Universal Records),
England and Germany (Wrasse Records), Okou is actually on tour
the project Okou has signed with AZ Records, album recorded at Sear Sound NYC with producer Jay Newland,
bassist Ira Coleman, drummer Andrew Borger, accordionist Brian Mitchell, tubist Dave Bargeron. String arrangements
by Gil Goldstein
Okou is signed to Universal Music Publishing France, recordings in the US with producer Jay Newland
guitars on the track "Deshalb bin ich hier" by Thomas D
music for the doc film "Grundeinkommen"
guitars for soundtrack from the film "Someone beside you"
guitars for play "Schwarze Jungfrauen" at Burgtheater Vienna
album with Jungleboy
project with Nitin Sawhney, composition for Schauspielhaus Hannover
swiss tour with Lovebugs on steelguitar
swiss & german tour with the jamaican singer Roy Ellis (Mr. Symarip)