It would be very difficult to simply take the map and recompile for TF2.
First of all, it uses world-portals from Portal2. You can't just copy that.
And the more important thing: You won't fit through a single doorframe. TF2 players use up a 48x48 space instead of the usual 32x32.
If you want the stanley parable in TF2, you would have to rebuild it all.