Taking a fixed seat house and converting it to GA

We have built and started selling packages to our next season -- we have NOT begun seating (but shows are linked to seat maps) and now realized we would like to make a few of our houses GA and not assigned seating.

It there any "easy" way to change our current seat maps into GA houses (not just the ticket design as we will then also need to make them available online and need online order to reflect that the seat maps are now GA)

Any suggestions?  I can try to explain our situation better if that helps -- thanks