In the past under CAR this was easy, under Part 61 it has become a little more difficult as the forms do not exist for overseas training, for design features.
Since 2013 i have run C208B courses in Indonesia that have been accepted by CASA. I supplied them with a mountain of paperwork including the companies approval to run the course, my instructor and check approvals and all of the training records.
After Part 61 came in i was initially told they couldnt do that, an applicant was rejected after casa having the paperwork for 4 months, but then eventually they accepted and approved it issuing the GTE.
So in short yes it can be done, but get all your paperwork in order and send it all at the same time.
Follow up casa every week as it will be shoved to the bottom of the pile, its in the too hard basket. If you need, ask to speak to the team leader at CASA..
Good luck.. PM me if you need,
Andy