Faatumu le fuaiupu lenei: Na faia e Gytis Masiulis lana amataga o le autalavou mo Lithuania i le 2014 FIBA Europe Under-16 Championship i Latvia. Na ia manumalo i se pine apamemea ma Lithuania i le 2015 FIBA Europe Under-18 Championship. I le tausaga mulimuli ane, na ia manumalo ai i le pine siliva i le 2016 FIBA Europe Under-18 Championship i Turkey. I le 2017, na avea ai Masiulis ma sui o Lituania i le
2017 FIBA Under-19 Basketball Ipu a le Lalolagi.