I'm going by memory as I only had a relatively brief look at both programs quite a long time ago.
I believe that George did have an export facility where you could export as .csv (comma seperated values). The completed file can be opened in Notepad. However, that is where the problems may start. In order to import into WCPro (if it has such a facility), it's unlikely that the fields and records will line up with exactly what you want to do in there. Also, due dates are calculations, so the formula rather than just the raw data might need to be moved over. Unless the author of WCPro has written a routine specifically to import data from George (or a .csv file based on George data) it may well be that manual entry is better as it would be less error prone.
However, it's a long time since I've looked at either program, so things may be easier now.
If you do attempt anything with this, make sure your back-ups are up to date first as the possibility of error is high.
I think your best bet would be to contact the author of WCPro to see if he has written a routine for this specific situation. Another danger is that, when importing, it might be possible to overwrite data rather than merging it.
I think you really need to either contact the WCPro author or do it manually.