How to use the G-raid thunderbolt drive for video editing without a thunderbolt port on mac pro

I have a G-raid thunderbolt drive that I use to back-up all my footage on shoots through my Mac Book Pro that has a thunderbolt port. I'm dealing with really large .dpx file sequences therefore the only viable option is to use the thunderbolt on field. However, back in our office I am unable to access my file sequences as the G-raid drive only allows two thunderbolt port connections. Since Mac Pro's don't support thunderbolt at the moment, I'm looking for a solution that can allow me to fully read if not write the hard-drive so that I can convert the image file sequences to the internal sata drives on my Mac Pro's.