since none of the gnustep packages build on gcc-2.x think you could add the packages in app-gnustep to the default-1.0 profile ?
#GNUStep stuff works in gcc-3 only ~dev-util/gnustep-back ~dev-util/gnustep-base ~dev-util/gnustep-gui ~dev-util/gnustep-guile ~dev-util/gnustep-make This is currently in default-1.0 profile which blocks the base files which should take care of the rest. It would get rather unwieldly to keep up with all the gnustep packages.