One of the reasons I came on here was to find out the same. I have seen on other forums that it is possible with a VU 2 solo with lots of plugins and setting up using a Vix image but as yet not the Zgemma 2s .
Definitely not straight out of the box when I bought mine ZG2 i did see the Symbol Rate was not shown as being sufficient for Intelsat 907 ( cant find that spec now) and no mention of Biss but that what plugins can do.
I currently use Icecrypt 1600 and also a 3200 with two Dishes with mult o/p Lnbs combined via Dissc? switches. They do the job easily and cheaply. However their facilities are nowhere near the ZG2 . As epg on the Icecrypts are only Now and next, 8 event timer and single tuner. Due to all the available progs on 907 being on the same Transponder its possible to record 1 ch and watch another though. The Gemma has 7 day EPG twin tuner and auto updates to channel changes, so its more user friendly. But we live in hope!