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I disagree. GPS receivers can be handicapped by a change in signal, so it possible that GNSS and GLONASS are the same.
Its the same way that the US can disable/disrupt civillian GPS and not their own receivers.
If a receiver chip is hardcoded to only operate if a certain code is in the timing signal, it will be disabled.
Literally every GPS device has this function built in. It is possible (but a total guess), that Galilleo foresaw a scenario where receiver chips might be disabled by region.
EDIT: The GPS schema calls it Selective Availability. GLONASS is rumoured to have the same functionality. It would be weird if GNSS would not be able to do something similar. One huge caveat in what I am saying is that neither GPS nor GLONASS can disable by country, only by military and non military receiver chips.
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Stonehedge
The "chips" are passive.
They are purely receivers, and the satellites are purely transmitters.
Unless there's a backdoor via a tethered internet connection, there's no way of retroactively bricking a receiver.