Here is a list of all files with brief descriptions:

[detail level 12]

event
gEventDataCollection.cc	Implements GEventDataCollection
gEventDataCollection.h	Defines GEventDataCollection, the event-level aggregation of detector hit data
gEventHeader.h	Defines GEventHeader, the metadata header associated with one event container
examples
event_example.cc	Event-level example demonstrating how to build and inspect GEventDataCollection objects
gframe_example.cc	Example demonstrating frame data collection
run_example.cc	Example demonstrating run-level integration of event data
frame
gFrameDataCollection.h	Defines GFrameDataCollection, a container for frame-level integrated payloads
gFrameHeader.h	Defines the GFrameHeader class, a minimal header describing a frame
gIntegralPayload.h	Defines GIntegralPayload, one integrated electronics payload sample
run
gRunDataCollection.cc	Implements GRunDataCollection
gRunDataCollection.h	Defines GRunDataCollection, the run-level aggregation of detector data
gRunHeader.h	Defines GRunHeader, the metadata header associated with one run-level collection
gDataCollection.h	Defines the GDataCollection class, the per-detector container of truth and digitized hit data
gdataConventions.h	Shared constants, schema keys, and error codes for the GData module
gdataDoxy.h	Main Doxygen page for the GData module
gDigitizedData.cc	Implements GDigitizedData
gDigitizedData.h	Container for digitized observables associated with one simulated hit
gTrueInfoData.cc	Implements GTrueInfoData
gTrueInfoData.h	Container for simulation-level observables associated with a single hit