Esteban Ocon started and finished third in the principality, while Gasly took seventh despite being frustrated by making a stop for dry tyres shortly before the rain came.
The Monaco performance came after disappointing weekends for the team in Bahrain and Baku, and the ensuing public criticism from Alpine CEO Laurent Rossi.
"I'll say I see more smiles," Gasly said when asked by Autosport if he could already sense a more optimistic mood. "Usually from past experience, the more people smile, the more efficient they get.
"So I must say I'm pleased for the entire team that we managed to get that result, that it managed to get some weight off their shoulders.
"I don't believe that is going to change anything in their approach, because we're all fighting, we're all pushing to get every everything out of the car that we got.
"Surely, I think it was a general feeling inside the team that we feel like we were not performing as much as we would have hoped at the start of the year.
"And the fact of seeing progression, evolution through these first Grands Prix can really probably like click and kick something within the team in terms of mindset, in terms of confidence, moving forward."
Gasly says that there has been a genuine improvement in the form of the A523 thanks to development parts and a better understanding of how to optimise the car.
Source: Autosport