Holes sizes from Gerber drill file?

Is there a simple way to interpret the Gerber drill file to determine the actual hole and/or finished holes sizes for specific parts. i.e. I need to know if the holes for certain parts (not listed in the part description - like resistors caps, LEDs, transistors, etc ) are going to work for me. Could it be standard in the future to include all hole size for every part in the bin?
Thanks

http://fritzing.org/forum/thread/960/

maybe there is a way do set holesizes within fritzing itself? (if this hasn’t ended at the bottom of a wishlist)