Swansea City striker Bafetimbi is on the brink of signing for Galatasaray.
Gomis met with Gala officials last week to thrash out personal terms.
La Provence says a three-year deal has been tabled and the striker could agree to terms today.
The Frenchman, however, is keen for Marseille to make their final offer before making any decision.
Gomis has just completed an outstanding 12 months on-loan with the French giants.