The GTViewer Framework for iOS packages up the code-base used by GTViewer for iOS and makes its functionality available to other applications.  This Framework is roughly equivalent to the GTViewer Objects (used with .NET) which are a set objects capable of reading and writing GTViewer data.  The Framework provides low-level access to Graphics Files (.GTG), Spatial Index Files (.GTN), Filter Files (.FLT), Style Definition files (.DEF, .MAP), Manager Files (.GTM), Tabular Data (.TXT, .IDX, .TAB), Font files (.DFN), Query Files (.QRY), and much more.  

The GTViewer Framework for iOS also provides full map rendering capabilities with panning, zooming, and feature selection.   A full GTViewer map viewing solution can be incorporated directly into your iOS application.