ok yea i found out you must go to
Libraries>Documents>My Games>Gas Powered Games>Sup Com FA
and create a maps folder then put in the map so go to ^^^^^ and create a folder called maps and put in the map folder and wallah done
In that folder there should be "Maps" "Mods" dunno if it works with lower case.
These fodlers get created when u download via gpgnet but as its down you have to make manaully.