"That is much more important, they can celebrate in December. There is no celebration, forget it."
Tost, though, was full of praise for Gasly for his efforts since rejoining "his family" in the wake of his demotion from Red Bull last summer.
Although Gasly has been one of the drivers of the season, Tost is confident the 24-year-old will not be leaving any time soon.
"If we lose him, it means the team did a good job because otherwise, they [Red Bull] wouldn't take him," he claimed.
"Currently, I am quite optimistic he will stay with us. He is very motivated. He was already last year when he came back from Red Bull.
"He came into my office and we greeted each other and he said he feels like he was here yesterday, that it is his family.
"He liked the car we had already last year, we had a competitive car and then from Spa onwards he improved his performance.
"In Sao Paolo [Brazilian Grand Prix last year] he finished in second place, that was also a good fight against [Lewis] Hamilton and here he drove a really brilliant race because he was in the lead and he controlled it."
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