Gaia Focused Product Release: The first results of quasars' environment analysis for gravitational lenses search

A list of sources around quasar candidates with minimum angular separation of 0.3 arcseconds to be used for gravitational lenses search. The publication mainly consists a table of 4.8 million sources (named components), based on an analysis of the observations in the neighbourhood of a list of 3.8 million quasar candidates. This table provides the mean astrometry and mean onboard photometry of the sources. The analysis of this table by several artificial intelligence algorithms which led to the selection of a list of 381 gravitational lens candidates that are presented in the associated Gaia Collaboration paper. The 4.8 million sources with their scores to be a lens are available at CDS. A table of individual epoch observations linked to their corresponding source (component), with their celestial coordinates and onboard magnitudes. A table of individual epoch observations classified as outliers and rejected by our clustering analysis, with their celestial coordinates and onboard magnitudes.