The 30-year-old joined Cobblers on a one-year deal last summer, making 25 appearances in all competitions.
But boss Justin Edinburgh said the club were unable to "get comfortable" with his commitments to DR Congo.
"Gaby is a top professional, we wish him all the very best for his future career," said Edinburgh.
League One side Northampton Town have released defender Gabriel Zakuani after contract talks broke down over his international commitments.