A 9GB "scoring tools" library (ie, built on 'sound design' type material for cinematic projects), Gravity houses a hugely extensive soundbank and preset/snapshot list in an action-packed (if a tad overdesigned) scripted interface.
This includes the usual Heavyocity toys - Twist and Punish, Trigger FX, EQ/Filter section - plus the new Motion step sequencer for modulation of volume, pan and pitch.
The library consists of four sections - Hits, Pads, Risers and Stings - each further subdivided into individual instrument folders and Menu patches. With each sound type differing significantly in the engine it uses, the specifics of the interface vary quite a bit, which keeps things interesting but can get a little confusing.
Worthy of particular note is the Designer page, in which you can construct layered risers and hits by mixing up Subs, Impacts, Tails and Whooshes.