Guid for EDKII implementation extension, used to indaicate there are bit fields in the varstore.
Include/Guid/MdeModuleHii.h

GUID Information

GUID's Guid Name	GUID's Guid
gEdkiiIfrBitVarstoreGuid	{0x82DDD68B, 0x9163, 0x4187, {0x9B, 0x27, 0x20, 0xA8, 0xFD, 0x60,0xA7, 0x1D}}

Refer to Header File