Feature Creation by Union of Vector/Raster Layers

So here's my question.  I'm performing some terrain analysis and trying to automate or at least make the creation of features quicker.  My goal here is to identify areas at or below a certain slope that also are not in a flood plain.  I have the slope file inserted (raster, *.adf format) and have it set suck that all areas below the slope cutoff are colored one color and everything that's too steep is another.   The flood/FEMA data is a vector file (*.shp).  I would like to have GM automatically draw a boundary line for areas that are both under the max slope and outside of the flood zone.  Is this possible with GM?  Thanks.
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