Gabbiano means "seagull" in Italian. It's a charming and somewhat whimsical word that isn't as common in everyday conversation as more basic nouns.
In the song, the narrator imagines a fantastical origin story for his beloved, where she receives "un passaggio da un gabbiano" (a ride from a seagull) to be brought down to Earth. This imagery adds a poetic and dreamlike quality to the lyrics, making gabbiano a memorable and evocative word.
Italian singer-songwriter Fabio Concato turns the arrival of a newborn into a fairytale in "Fiore Di Maggio" (May Flower). Instead of a cold hospital room, he imagines the baby picking her parents from the sky: "E ci hai visto su dal cielo / Ci hai provato e piano sei venuta giù" (And you saw us from up in the sky / You gave it a try and slowly came down). She hitches a ride on a seagull—"Un passaggio da un gabbiano" (A lift from a seagull)—which gently sets her down on a sea cliff right into the world.
The lyrics mix sweet seaside memories with funny, dizzy confusion. Concato remembers a whole village celebrating with songs and wine, but his memory gets totally scrambled: "O forse sei nata tu / O a casa di mio fratello non ricordo più" (Or maybe that was when you were born / Or at my brother's house, I can't remember anymore). By calling her "Sole di primavera" (Spring sun) and a flower blooming on a cliff ("Su quello scoglio in maggio è nato un fiore"), he keeps the whole song warm, light, and wrapped in bright Mediterranean sunshine.