Maresca has agreed a three-year deal to succeed Pep Guardiola, one of the greatest coaches of the modern era, and will be tasked with continuing Manchester City's period of sustained success.
Former City captain Gundogan, who worked alongside Maresca during the Italian's time as a City assistant, says he has no doubts over his old colleague's ability to thrive in the role.
"As a coach I think he has amazing qualities," Gundogan said.
"Maybe they are now obviously different than he was when he was an assistant - this is something I can't really judge - but you know that he's smart and he knows exactly what he does. As a human being he's unbelievable, honestly.
"In this football world I have not met many other people like him to be honest. I think he will be incredible and, similar to Pep, he has the intelligence to do the right decisions and to do the right tactical things. But then also the human side, to get everyone on board. I'm sure that probably 99% of the people inside the club will also be very happy."
Gundogan's comments carry weight given his experience working under both Guardiola and Maresca during his time at the Etihad Stadium.
The pair worked together while Maresca held an assistant coaching role at City, giving Gundogan a close view of the qualities that have now persuaded the club to hand him the top job.
Guardiola's departure brings to an end one of the most successful managerial spells in the club's history, and Maresca's task will be to maintain those standards while stamping his own identity on the squad.
Gundogan's praise for Maresca's man-management as well as his tactical qualities suggests the incoming manager will look to build the same kind of dressing room unity that underpinned City's success under Guardiola.
With the appointment now confirmed, attention will turn to how Maresca reshapes the squad and sets out his vision for the season ahead, with support from within the camp already evident.
Gundogan's willingness to speak so openly in support of Maresca will be seen as a significant early endorsement, coming from a player who has experienced both the demands of the dressing room and the standards Guardiola set during his time in charge.
The scale of the task facing Maresca should not be understated given the standards set by his predecessor, but Gundogan's assessment suggests there is genuine belief within the squad that the transition can be managed smoothly.