The Lyon striker, who has a year left on his contract, confirmed his proposed move to St James' Park this summer collapsed because the Magpies wanted him to take a pay cut
The France international was linked with a move to St James' Park over the summer as his current club continued in their efforts to offload him.
But the 28-year-old wouldn't take the drop in wages which was required to seal the move to Newcastle and will instead see out the last year of his current deal at the Stade de Gerland.
"I had a talk with Newcastle's coach and we found an agreement," Gomis told Canal Football Club.
"Then, there were talks with Lyon, there was a first offer - which was refused and then a second one, which was accepted.
"Newcastle then came back to me and asked me to make an effort on wages - but I never asked anything as it was my club which wanted to transfer me, so the effort had to be made by Newcastle or Lyon."
Gomis also confirmed that a new deal with Lyon was highly unlikely.
"Now I think after what has been said and done, it is not conceivable to talk about any prolongation," he added.