2002: NBN

Gaba appeared on the NBN children's educational show Eskwela ng Bayan in 2002.^[1] He starred in the segment "Karen's World" as a farmer named Inggo who learns English from Karen Kalabaw, a talking carabao, played by Monica Llamas.^[9]

2004–2021: GMA Network

In 2004, he co-hosted the arts and crafts children's show, Art Angel, with Pia Arcangel and child actress Krystal Reyes. He remained throughout the entirety of the show, even after Arcangel left in 2010,^[10] who was replaced by actress Anne Barcelo. In a separate endeavor in 2008, Gaba directed the educational show, Batang Bibbo!, which also starred Barcelo. With the launching of GMA News TV, Gaba hosted the magazine show Pop Talk, since its premiere in March 2011.^[11][12] After a seven-year run, Art Angel concluded and was replaced by Sabadabadog! with Gaba as its host, until November 2011.^[13][14][15] He later joined the morning show Unang Hirit, reuniting with his former co-host, Arcangel.^[16]

During the COVID-19 pandemic in 2020, GMA News TV launched the series New Normal: The Survival Guide; Gaba, alongside Rovilson Fernandez, remotely hosted Home Work—an informative show sharing life hacks at home during the quarantine.^[17][18] GMA Network also aired a limited rerun of Art Angel in May;^[19] Gaba then addressed the former supporters of the show on social media while he expressed his hopes for the show to return someday with new episodes.^[20][21] In November of the same year, he resumed hosting Pop Talk after production was postponed.^[22] In October 2021, Gaba bid farewell as Pop Talk ended after its tenth year.^[23]

2021–present: NET25

Prior to Pop Talk's conclusion, Gaba already appears and co-hosts on the NET25 morning news and talk show, Kada Umaga, since its premiere in August 2021.^[24][25] He hosts the segments "Toni Knows"^[26] and "Tonipet's Take Out".^[27]