As it comes to OSPF link types in general the following are possible:
- point-to-multipoint non-broadcast
Which OSPF link types are supported on GAiA? Out of the box it seems to be doing broadcast. I couldn't find a clear statement from Check Point about this.
Note that in sk110912 it says that OSPF point-to-point connections are available on 61000/41000 appliances, but I'm more interested in appliances like the 15000 series.