Besides TuxGuitar’s own file format (with *.tg extension), TuxGuitar can work with various tablature and music file formats.
old Guitar Pro (.gtp) - load
Guitar Pro 3 (.gp3) - load and save
Guitar Pro 4 (.gp4) - load and save
Guitar Pro 5 (.gp5) - load and save
PowerTab (.ptb) - load
TableEdit (.tef) - load
LilyPond (.ly) - export
MIDI (.mid) - import and export
ASCII (.txt) - export
MusicXML (.xml) - export
Adobe PDF (.pdf) - export