Gelabert was definitely promoted to Castilla in June 2018, but suffered a knee injury which kept him sidelined for the most of the season.[3] After subsequently overcoming another injury, he scored his first senior goal on 3 November 2019, netting Castilla's first in a 2–4 away loss against Sporting de Gijón B.[4]
After attracting interest from several clubs across Europe during the 2020 summer, Gelabert opted to stay,[5] but was unable to establish himself as a regular starter during the campaign.
Mirandés
On 5 August 2021, Gelabert signed a two-year deal with Segunda División side CD Mirandés.[6] He made his professional debut eleven days later, starting in a 0–0 away draw against Málaga CF.[7]
In January 2022, Gelabert was sidelined for the remainder of the season after suffering another knee injury.[8] Back to action in August, he scored his first professional goal on 2 November, netting the winner in a 1–0 home success over CD Tenerife.
Toulouse
On 6 June 2023, Ligue 1 side Toulouse FC announced the signing of Gelabert on a four-year contract.[9]
Gelabert's father Juanmi was also a footballer.[11] A defender, he played for several seasons in the second tier, aside from a two-year spell at La Liga side Sevilla FC.[12]