no, thats only for games from 6.x+, the issue he is having is that gateway will also only accept 512kb saves, and most card1 games use 128kb, for those games, there is currently no way to copy your save over to use on gateway
guide to taking your retail saves over to gateway, check if game uses FW version 6.x+ on
http://3ds.essh.co if it does give up for now (unless it was played on a 4.x console in emunand)
if it was bundled with 5.x or lower(or played on a 4.x system in emunand), dump the save, check its file size, if its 128kb.....give up(for now)
if its 512kb dump your cart, rename it to ***.3dz, and rename the dumped save to (games titleID).sav (also available on essh)