Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

▼Ngams
CGAMSCheckpoint
CGAMSDatabase
CGAMSDatabaseDomainViolation	This class describes a domain violation of a GAMSDatabase
CGAMSDatabaseIter
CGAMSDomain	This class represents a abstraction of GAMSSet objects and relaxed sets, i.e. strings
CGAMSEnum	The collection of all common GAMS enumerations
CGAMSEquation
CGAMSEquationRecord	This class represents a single record of a GAMSEquation
CGAMSException	Exception class thrown for GAMS exceptions
CGAMSExceptionExecution	Exception class thrown for GAMS execution exceptions
CGAMSJob
CGAMSModelInstance
CGAMSModelInstanceOpt	The GAMSModelInstanceOpt can be used to customize the GAMSModelInstance.solve() routine
CGAMSModifier
▼CGAMSOptions
CEAction	GAMS processing request
CEAppendExpand	Expand file append option
CEAppendOut	Output file append option
CEAsyncSolLst	Print solution listing when asynchronous solve (Grid or Threads) is used
CECaptureModelInstance	Switch to capture all model instances within a run
CECase	Output case option for LST file
CECharSet	Character set flag
CECheckErrorLevel	Check errorLevel automatically after executing external program
CEDFormat	Date format
CEDigit	Switch default for "$on/offDigit"
CEDumpOpt	Writes preprocessed input to the file input.dmp
CEDumpParms	GAMS parameter logging
CEECImplicitLoad	Allow implicit loading of symbols from embedded code or not
CEECLogLine	Show log line about embedded code initialization and execution or not
CEEmpty	Switch default for "$on/offEmpty"
CEErrMsg	Placing of compilation error messages
CEExecMode	Limits on external programs that are allowed to be executed
CEFDOpt	Options for finite differences
CEFileCase	Casing of file names and paths (put, gdx, ref, $include, etc.)
CEFiltered	Switch between filtered and domain-checked read from GDX
CEForceWork	Force GAMS to process a save file created with a newer GAMS version or with execution errors
CEFreeEmbeddedPython	Free external resources at the end of each embedded Python code blocks
CEgdxCompress	Compression of generated GDX file
CEgdxConvert	Version of GDX files generated (for backward compatibility)
CEgdxUels	Unload labels or UELs to GDX either squeezed or full
CEHoldFixed	Treat fixed variables as constants
CEHoldFixedAsync	Allow HoldFixed for models solved asynchronously as well
CEImplicitAssign	Switch default for "$on/offImplicitAssign"
CEInteractiveSolver	Allow solver to interact via command line input
CEIntVarUp	Set mode for default upper bounds on integer variables
CEKeep	Controls keeping or deletion of process directory and scratch files
CEListing	Switch default for "$on/offListing"
CELogLine	Amount of line tracing to the log file
CELstTitleLeftAligned	Write title of LST file all left aligned
CEMemoryManager	Allows to try an experimental memory manager
CEMIIMode	Model Instance Mode
CENoNewVarEqu	Triggers a compilation error when new equations or variable symbols are introduced
CEOn115	Generate errors for unknown unique element in an equation
CEPageContr	Output file page control option
CEPrefixLoadPath	Prepend GAMS system directory to library load path
CEPreviousWork	Indicator for writing workfile with previous workfile version
CEProcTreeMemMonitor	Monitor the memory used by the GAMS process tree
CEPutNR	Numeric round format for put files
CEReferenceLineNo	Controls the line numbers written to a reference file
CEReplace	Switch between merge and replace when reading from GDX into non-empty symbol
CESavePoint	Save solver point in GDX file
CEShowOSMemory	Show the memory usage reported by the Operating System instead of the internal counting
CESolPrint	Solution report print option
CESolveLink	Solver link option
CESolveOpt	Multiple solve management
CEStepSum	Summary of computing resources used by job steps
CEstrictSingleton	Error if assignment to singleton set has multiple elements
CEStringChk	String substitution options
CESuffixAlgebraVars	Switch default for "$on/offSuffixAlgebraVars"
CESuffixDLVars	Switch default for "$on/offSuffixDLVars"
CESuppress	Compiler listing option
CESys10	Changes rpower to ipower when the exponent is constant and within 1e-12 of an integer
CESys11	Dynamic resorting if indices in assignment/data statements are not in natural order
CESysOut	Solver Status file reporting option
CETFormat	Time format
CETraceOpt	Trace file format option
CEZeroResRep	Report underflow as a warning when abs(results) LE ZeroRes and result set to zero
CGAMSParameter
CGAMSParameterRecord	This is the representation of a single record of a GAMSParameter
CGAMSPath	Represents the GAMS path to a specific file
CGAMSPlatform	Encapsulates all platform specific calls of the API
CGAMSSet
CGAMSSetRecord	This is the representation of a single record of a GAMSSet
CGAMSSymbol
CGAMSSymbolDomainViolation	This class describes a domain violation of a GAMSSymbol
CGAMSSymbolIter
CGAMSSymbolRecord
CGAMSVariable
CGAMSVariableRecord	This is the representation of a single record of a GAMSVariable
CGAMSVersion	Represents the GAMS version information
CGAMSWorkspace
CGAMSWorkspaceInfo	The GAMSWorkspaceInfo can be used to input parameters for the GAMSWorkspace constructor
CGAMSWorkspacePool	Manages a collection of all GAMS workspaces
CLogger	Logging class used to get feedback about the API actions
CLoggerPool	The class to manage all loggers used in an API instance
CSolverOptions	Represents the solver options