A (Galactic) journey through Gaia's decade of discoveries

On July 25th, 2024, Gaia community will celebrate the 10th anniversary of successful scientific data acquisition. There have been 10 years of technological and scientific success with more than 11,000 papers published in all transversal fields of astronomy, from solar system to extragalactic science. Here we present a by no means exhaustive list of the scientific achievements of the Gaia mission, from the first discoveries to recent exciting findings. We emphasize the work that our Spanish REG Community - more than 200 members - have achieved.We also describe the REG Working Group (WG) activities and the challenges we envisage in the next years combining Gaia-DR4 (66 months of data, publication not before Q3-2026) and the on-ground ongoing and future spectroscopic surveys.