transparent background in gif

[fgsfds123]

Attached.
Also:
convert lol.gif -scale 200% out.pnm
convert lol.gif -sample 200% out.pnm
correct

but
convert lol.gif -resize 200% out.pnm
no

Version: ImageMagick 6.5.6-1 2009-09-15 Q16 OpenMP