The Gaisser Memorial Meeting will be held by the Bartol Research Institute at Newark Country Club close to the University of Delaware from 19 to 21 April 2023. This meeting will be held to honor the memory and celebrate the pioneering work in astroparticle physics of Tom K. Gaisser (1940-2022). This will be a small gathering of those who worked directly together with Tom to participate, share their memories, and tell us how their scientific research developped.