Implications of deferring UK pension on GIS in Canada

This is tax related but more about GIS.

OK I'm soon 66 and came to Canada a few years ago and didn't make many CPP contributions, so I get a tiny amount of CPP.

I get some OAS, but most of what I get is GIS.

I'm due my UK pension in Jan 2024 but have the option to defer it (and then later get a slightly higher pension).

Is it likely / possible that - if I did defer - Gov Can would say that as I was choosing not to take an income (ie by not taking my UK pension yet), my GIS would be reduced ?

Any thoughts ?