epslatex terminal does not work with boxed multiline text:
set terminal epslatex standalone set output "gpboxedtext.tex" set label at 0,3 "second label\nmultiline" boxed plot x
I don't know a good way to fix this, because putting a
\framebox around all
\put commands for the lines does not work, as they do not occupy any space.
A possible fix would involve offering a multitext terminal call, but I don't know if such a deep change is acceptable for this minor feature.