Context : \beta Pictoris b is one of the most studied objects nowadays since it was identified with VLT/NaCo as a bona-fide exoplanet with a mass of about 9 times that of Jupiter at an orbital separation of 8-9 AU . The link between the planet and the dusty disk is unambiguously attested and this system provides an opportunity to study the disk/planet interactions and to constrain formation and evolutionary models of gas giant planets . Still , \beta Pictoris b had never been confirmed with other telescopes so far . Aims : We aimed at an independent confirmation using a different instrument . Methods : We retrieved archive images from Gemini South obtained with the instrument NICI , which is designed for high contrast imaging . The observations combine coronagraphy and angular differential imaging and were obtained at three epochs in Nov. 2008 , Dec. 2009 and Dec. 2010 . Results : We report the detection with NICI of the planet \beta Pictoris b in Dec. 2010 images at a separation of 404 \pm 10 mas and PA = 212.1 \pm 0.7 ^ { \circ } . It is the first time this planet is observed with a telescope different than the VLT . Conclusions :