It’s about to not be a thing. They are removing XBLG, and changing it to be “Gamepass Core” so the new 4 tiers of Gamepass are as follows.
Core: 25 Gamepass Games + Online Multiplayer Console Gamepass: Full Gamepass Library, No Online Multiplayer. PC Gamepass: Full PC Gamepass Library (PC games don’t need Online Multiplayer as a paid thing) Gamepass Ultimate: Full Console+PC Gamepass Library + Online Multiplayer + Cloud Gaming