Since the game uses dosbox why not make a native installer to utilize it on linux/mac ?

Using Ubuntu myself.

GOG doesn't do that and it's very unlikely they'll ever do it because of the amount of additional workload it would give them to test every game on an additional OS.
If you really want to play the game on Linux you might want to try unpacking the installer and configuring it yourself on Linux.

It would be nice to have a Linux version.
Seems linux gaming is somewhat on the rise - all the Humble Bundle release's have Linux versions, and thats a pretty big collection of games now.

Not sure testing would be that bad either - I would think GoG just ensures the engine runs ok. They might play over a game once, but not to the extent that the original (developers) game testing would be.

Got it running :)

I assume you have wine and dosbox and that the GOG lba installation is on the wine C: partition:

in the terminal run:
gedit lba-link

paste this in:

#!/bin/bash
#Start Little Big Adventure
dosbox -conf /home/jasiek/.wine/drive_c/LBAgog/dosboxLBA.conf -c "mount c: /home/jasiek/.wine/drive_c" -c "imgmount d: c:/LBAgog/LBA.DAT -t iso" -c "c:" -c "cd LBAgog" -c "RELENT" -c "exit"
exit 0

Change jasiek to whatever your username is. Right click on the file, into permissions and set it as executable.

move the lba-link file to your games folder, make a shortcut to it, set it as executable, give it your gog, or your favourite icon.