Warning: this article contains spoilers for Better Call Saul season 6.
As a prequel to Walter White in Breaking Bad, Gus assumes his persona as the owner of Los Pollos Hermanos and only breaks character when necessary. One of the greatest examples of Gus' circumspect nature is how the hub of his drug empire in Breaking Bad is situated in a clandestine laboratory that's hidden underneath a laundry.
While Gus' superlab is not in operation yet in Better Call Saul season 6, its construction began in season 4. Mike was in charge of Werner Ziegler and his team of German engineers, who constructed most of the laboratory that Walt and Jesse work in during Breaking Bad. The construction is yet to be complete, however, after Ziegler went rogue and sparked the curiosity of Lalo Salamanca, giving Lalo his first inklings that Gus is working towards his own aims. In Better Call Saul season 6, Gus is convinced that Lalo is still alive, and has ramped his precautions up to another level.
Better Call Saul season 6 shows that Gus' secrecy extends to all aspects of his life, even his home. Better Call Saul season 6 episode 4, "Hit and Run," sees Gus travel in an underground tunnel between his house and his neighbors'. While his neighbors' house appears ordinary, they only occupy a small room of the house, while Gus uses their living room as a surveillance site. This age and base of operations share huge similarities with his superlab and demonstrate how Gus may have first come up with the idea for his lab under a laundry. The fact that both look normal at face value also mirrors Gus' personality - squeaky clean on the surface, but underneath his veneer, he hides terrible and dangerous secrets.
It's fitting that the entrance to the hidden age in meth superlab from Breaking Bad evolves from the age in Gus' home is its entrance. The entrance to the age lies behind a shelving unit, however, the superlab's entrance is more intricate, as it is underneath an industrial laundry unit that can lift off the floor. The improvement could indicate that the age in Gus' home could eventually be uncovered but it's more likely just a necessary precaution as Gus' home is naturally a more secure location than a laundry on the outskirts of Albuquerque.
Both the superlab and Gus' hidden age perfectly reflect Gus' true character and how he presents himself to the outside world. To his customers, Gus appears well-mannered and professional, a man happy to help with complaints in his restaurant and he gives to charity. Even Gus' appearance reflects this facade and his cautiousness. Better Call Saul season 6, episode 4 shows how Gus keeps all his yellow shirts and his wardrobe in perfect order - his appearance is crucial to maintaining his businessman persona. Similarly, his house and the laundry seem perfectly normal, without a shred of suspicion to be found. When scratched beneath the surface, however, his home and the laundry reveal their unsettling true purpose. The same can be said for Gus, who when pushed to his limits and away from the eyes of the outside world, is capable of evil and murderous acts.
New episodes of Better Call Saul air every Monday on AMC.