Thank you for your input! We will consider this functionality in upcoming releases if it will be popular.
Everyone, please continue voting for this feature if you consider it important.
— rkLester Galanis commented
I just found this thread and I am so surprised that this is not supported. We have geo dns and we setup also subdomains pointing practically the same wordpress installation and we are getting the SSL error because of https:// frame not supported. THIS IS ABSOLUTELY LUDICROUS.
It is not like we need SSL for everything nowadays.