Gas is the dominant mass constituent of protoplanetary disks. Its structure and evolution profoundly impact every major step of planet formation: planetesimal formation, accretion of planetary atmospheres, and migration of planets. Yet, we do not have a basic understanding of how the gas disk evolves and what mechanism drives the global evolution. The "ALMA survey of Gas Evolution in PROtoplanetary disks", AGE-PRO, is the first ALMA Large Program to constrain the evolution of the mass and size of gas disks at three evolutionary phases: the embedded disk phase, the middle-age, and the end of the disk lifetime. The main goal of AGE-PRO is two-fold: to provide a key legacy dataset to test current main theories of disk evolution and planet formation, and to compare model predictions of disk evolution with mass and size measurements of disks at different ages. In this poster we will present the recently acquired observations of the AGE-PRO sample of 30 disks between 0.1-10 Myr old, and we will discuss some preliminary results of the survey.