Napoli are a bigger club than Atalanta and have better so they can give Gasperini more opportunities to upgrade his coach career and reach a higher level. An offer from Napoli will be very interesting and hard to refuse. Only very big love for Atalanta will force Gasperini to refuse such offer from Napoli.
I think currently Gian Piero Gasperini is confused because a higher club has offered him a contract to coach that club, of course this is good to increase his experience as a manager by trying a new challenge coaching an elite club but maybe he will feel a lot of pressure because he has to bring Napoli to achieve better performance but that is the coach's job if he wants to coach a big club. Even under pressure if he has smart tactics then it will make Napoli perform better because to build a club there must be a good strategy to build the club's performance Gian Piero Gasperini has provided unexpected surprise this season.
Gian Piero Gasperini proved to be intelligent because he was able to read the tactics used by Xabi Alonso and Jurgen Kloop when other coaches had difficulty reading Xabi Alonso's tactics. He was able to read them and made his club perform extraordinary by scoring 3 goals with only relying on 1 player and Leverkusen seemed to have difficulty keeping up. Atalanta's game, even Leverkusen's shot did not result in a goal, while Atalanta was able to turn it into a goal, it is said that the coach's tactics were very effective.