According to this eBay ad:
http://www.ebay.com/itm/Set-Lot-Cutt...-/160505683956
It has to be a cuttlebug version 2 (so it is wide enough to take the Go dies), and the Go dies will require one mat underneath and one or two mats on top to go through the cuttlebug.
Edit: Also, it's not clear to me whether all Go dies will work this way, or if it's only the Baby Go dies and/or some of the regular Go dies.
Do you have a specific cuttlebug machine and specific Go dies in mind?
I also found this "hack" for using Go dies in the cuttlebug:
http://quiltingcrossroads.blogspot.c...to-use-in.html