Zoiks! That's pretty darn scary! I've been using GS since April last year, and yours is the first example of a Kernel Panic associated with it that I've heard of! Just bad luck maybe? QS
I have looked at GS but as yet have a couple of unanswered questions i sent via email. Seems customer support is none existent? My Q's, Does GS support facebook/twitter and others? Does GS support DLC so we can release for free and charge for extra content? Online leaderboards/awards? Looks great for the price of $99 indie version but tbh it needs a lot of extras for me to look at this seriously, Darren.
They'll always respond if you post something on the forums, but they're still pretty small. It supports nothing of what you mentioned, which'll probably cause me to finish my game, but wait before submitting it.