Marko, who acts as an advisor to Red Bull and heads its junior driver programme, predicted that the energy drink squad would win five races in 2019.
Max Verstappen took three victories throughout the year, however the team was competitive at many more races during the campaign.
Marko was reluctant to state an exact number on how many races his team could win this year, but states that more than five is what it should aim for.
"I don't want to pin down to a specific number, but I think it should be more than five," he told Motorsport.com. "In addition, I also think that we will not see escapades like those at Ferrari in the coming year."
The Frenchman underperformed at Red Bull and was replaced by Alexander Albon, but showcased strong pace during the second half of the year, picking up a podium finish in Brazil.
It marked a stark contrast to the form of Daniil Kvyat following his demotion to Toro Rosso in 2016, as he struggled to perform after losing his seat at Red Bull to Verstappen.
"In contrast to Kvyat, who was completely devastated by it, Gasly flourished again at Toro Rosso," stated Marko.
"That is great for him, but also for us. I think he has learned from it and that he has drawn the right conclusions from six months at Red Bull."
Bahrain International Circuit - Winter testing