Born in Zizonys, Biržai district municipality, in 1882, Galvanauskas completed his secondary education at the Gymnasium of Jelgava, Latvia in 1902.

[1] Between 1906 and 1919, he lived first in Finland, then in Liège (Belgium) from 1908, where he completed his studies and received a diploma in mining engineering from the Technical University and another one from the Electrotechnical Institute, then he worked on the railroad in Serbia.

His home was the target of a bomb attack by extreme nationalists (Committee for the Salvation of Lithuania) who suspected him and his French wife to be pro-Polish, he was injured.

He was involved in re-organizing Klaipėda's woodworking industry, and founded a building company that constructed apartments for workers.

He was member of the board of directors for the Rytas publishing house, and chief editor of the newspaper Vakarai.