I just did solo dives at Gilboa this past weekend and I did a few up at Portage earlier this year. So far Mike and Jeff hasnt said no.
Just to be completely correct... Solo diving is still listed as prohibited on Gilboa's paperwork. So is decompression diving as well as a few other activities. However, in order to engage in these activities, one must have a conversation with Mike. Part of that conversation is for him to make sure you are properly trained in the activity and that you hold the proper certification level. After the conversation, Mike then makes copies of your certification cards to include with his paperwork if you are given the permission to partake in such activity.