The GRX pulley is long enough to necessitate every single link. No cutting required.
It might be long enough but you should still size the chain correctly and cut to size so the chain isn't too long, so shortest it can be in big/big ring plus 1 full link, or 2 links if it's 1x (and 1 more if full sus, which it's obviously not).
It might be long enough but you should still size the chain correctly and cut to size so the chain isn't too long, so shortest it can be in big/big ring plus 1 full link, or 2 links if it's 1x (and 1 more if full sus, which it's obviously not).