Throughout the GESTAR II Annual Report Year 3 (October 1, 2023 – September 30, 2024), GESTAR II researchers across many disciplines were involved in some way with the PACE mission, the HARP2 instrument onboard PACE, and the subsequent PACE-PAX field campaign. Of great importance was the extension of the GESTAR II cooperative agreement from its original three years to a full five years (i.e., November 2026).