Are there any other ways to access the content on the G-CONNECT with my iOS device?

The G–CONNECT supports a variety of interface protocols that allow you to access, view and play content directly from the G–CONNECT. For iOS devices, the G-CONNECT supports WebDAV, DLNA and basic network protocols. There are a variety of third-party apps that support these protocols that can be used with the G-CONNECT to access your content.

Here are some Apps that you may consider that interface with these protocols.
Apple Pages® (WebDAV)
Apple Numbers® (WebDAV)
Apple Keynote® (WebDAV)
WebDAV Nav (WebDAV)
MediaConnect (DLNA)
WOON (DLNA)
BUZZ Player (DLNA)
8player (DLNA)
GoodReader (Supports AFP and HTTP)

These Apps are available through the Apple iTunes App Store.