Yes, the program uses the ABS GTS. For the cows you can specify your mating criteria to include such things as:
Reduce Birth Weight, Increase Weaning Weight, Increase Milk, Reduce Fat, Increase %Retal Product, Increase/Reduce Stature, Increase Capacity, Body Length, Muscle, Straighten Rear Legs, Improve Utter, Incrase Feminiity, and others. You can have the program do various auto or manual weigthing of these traits.
In my application, I evaluated each cow's phenotype and her EPD's and used the Manual Trait Weighting option to select what I wanted to improve on a particular cow. Seems like a reasonable tool to me. Biggest limitation is the availability of the GTS for non ABS bulls; however you can add bulls using your own evaluation.