1. Go to here: https://www.moddb.com/games/battlestations-pacific/downloads/gfwl-basic

This file is an installer for GFWL and is uploaded by the guy behind the BSHQ mods.

2. Install the launcher and launch the game.

3. Log into your Microsoft account it will work even on this old program so you can earn achievements.

New:

4. If for some reason you still cannot get it to work then a member of the community named DerpusX was awesome enough to put this here too: https://www.moddb.com/games/battlestations-pacific/downloads/gfwl-installation-and-dependencies

And that should do it, hopefully this will allow you to play now I do hope it helps and if not feel free to let me know.