hi,
from
http://gnomeslackbuild.org/download/#slaptgetrc example:
WORKINGDIR=/var/slapt-get
EXCLUDE=^kernel-.*,^alsa-.*,^glibc.*,.*-[0-9]+dl$,^devs$,^udev$,aaa_elflibs
SOURCE=ftp://ftp.slackware.com/pub/slackware/slackware-13.1/:OFFICIAL
SOURCE=http://mirrors.gnomeslackbuild.org/gsb/gsb-2.30_slackware-13.1
but, change 13.1 to 13.37 and gsb-2.3... to gsb-3.0_slackware-current, because there is no, in this moment, gsb-3.0 13.37.