Gentoo (Pygoscelis papua) penguin colony population behavior/dynamics have been studied during 2018-19 season. The detailed observation of birds arrival, nesting, hatch and crèche has been provided in two colonies at GAI CEMP site at Galindez Island nearby the Vernadsky station. We inform on the results of visual survey of penguin population and penguin count. During the 2018/19 season biologist winterer at Vernadsky station at Galindez Island, provided continuous observations every day/each five days of gentoo GBV and GPP sites. The results of visual observations of penguin population changes are discussed.