What sources are you using in /etc/apt/sources.list?
I ask because libgd1 1.8.4-17.woody2 and libgd1-noxpm 1.8.4-17.woody2 should be available to you.
Did the apt-get update (or dselect Update) fail?
Are you choosing to not run dselect after tasksel? Ilve never tried doing that so don't know how it works or doesn't work. Try running dselect with Update, Select and Install.
More than likely, it is a simple matter of no entries for security.debian.org.
-Roberto
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