void (__cdecl* __ptr64 m_lpfnGDlgDebugSO__DebugMessage)(class GMessage * __ptr64, bool)

Mangled name

?m_lpfnGDlgDebugSO__DebugMessage@@3P6AXPEAVGMessage@@_N@ZEA

Exported by

size	filename	version
3329024	gdb.dll	10, 0, 0, 1