/usr/include/GNUstep/EOAccess/ is in libgnustep-dl2-dev 0.12.0-15.1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/GNUstep/EOAccess/EOAccess.h
/usr/include/GNUstep/EOAccess/EOAccessFault.h
/usr/include/GNUstep/EOAccess/EOAdaptor.h
/usr/include/GNUstep/EOAccess/EOAdaptorChannel.h
/usr/include/GNUstep/EOAccess/EOAdaptorContext.h
/usr/include/GNUstep/EOAccess/EOAttribute.h
/usr/include/GNUstep/EOAccess/EODatabase.h
/usr/include/GNUstep/EOAccess/EODatabaseChannel.h
/usr/include/GNUstep/EOAccess/EODatabaseContext.h
/usr/include/GNUstep/EOAccess/EODatabaseDataSource.h
/usr/include/GNUstep/EOAccess/EODatabaseOperation.h
/usr/include/GNUstep/EOAccess/EODefines.h
/usr/include/GNUstep/EOAccess/EODeprecated.h
/usr/include/GNUstep/EOAccess/EOEntity.h
/usr/include/GNUstep/EOAccess/EOGenericRecord.h
/usr/include/GNUstep/EOAccess/EOJoin.h
/usr/include/GNUstep/EOAccess/EOModel.h
/usr/include/GNUstep/EOAccess/EOModelGroup.h
/usr/include/GNUstep/EOAccess/EOPropertyListEncoding.h
/usr/include/GNUstep/EOAccess/EORelationship.h
/usr/include/GNUstep/EOAccess/EOSQLExpression.h
/usr/include/GNUstep/EOAccess/EOSQLQualifier.h
/usr/include/GNUstep/EOAccess/EOSchemaGeneration.h
/usr/include/GNUstep/EOAccess/EOSchemaSynchronization.h
/usr/include/GNUstep/EOAccess/EOStoredProcedure.h
/usr/include/GNUstep/EOAccess/EOUtilities.h