Great, thanks Marco.
The "we have a JavaScript SDK" services I'm thinking of (push, analytics, authentication, offline sync, MBAAS data storage etc) mostly offer REST endpoints as well as platform-specific libraries , but life's hard enough. ;-) If there was a way of importing 3rd party SDKs and then calling them from Gravity that would be amazing. It wouldn't have to be importing JS SDKs specifically but JS is fairly ubiquitous of course.
Passively opening up Creo to allow 3rd parties or the community to bring SDKs across to Gravity is unlikely work in my opinion. There's already so much fragmentation in established mobile technologies (Ionic, Steroids, Angular, Titanium the list goes on.....) and only a limited amount of time anyone has available - if people are going to provide libraries for something it's likely to be one of the bigger names, or at best the bigger names much sooner than newcomers such as Gravity.
I can understand why LiveCode developed their own language for cross-platform RAD as it has a USP: it's extremely easy for people to learn. But I remain to be convinced that, however technically superior it may be, Gravity can gain traction if it's "yet another thing to learn when I could be learning Angular - a transferable skill".
Anyway - I'm really looking forward to upcoming releases of Creo and going through the documentation
Steve