Gus's Step-Aunt Kylie Mayor was staying in the resort of La Costa Verde when she first met his mother, Florita Hernandez. Florita was in labour with Gus at that point, and Kylie took her to the hospital, where she attended Gus's birth with Florita.
Gus makes his first official appearance as a child in Part 11: Woohoo with your mom!, where he answers the door when Kayden comes to visit the Hernandez household, in hopes of getting to know his mother Florita.
After his mother's marriage to Kayden, Gus aged up and ventured out on his own, moving into his own house boat. Lifesimmer would occasionally visit him and see him around the town and in her resort. However, she would always criticize his actions and looks and seemed not to be very fond of him.
- The reason why LifeSimmer disliked Gus, was due to her finding out he was Florita's son when she wanted Kayden to get together with Florita, viewing him as an annoyance.