I think we should raise a petition to Google for misleading translation from Chinese, thanks for clarification & testing.
It's still unclear what's the purpose of this script on Boot as it does not make any sense to me.
Regarding "extra super secret scripts" - it would not surprise me, as this would be not the first case, few examples: root:root, SMTP passwords
/dev/i2c-0 brought my attention as it's used for FRAM access as well, just on a different registry.
The question is does it (cfg_gtp) update on memory or persist it. If the later than it might be an initialisation script, but so far have not found any usage cases (calls).
Just don't forget that scope have a magic "call home" function & capability to execute any shell command i.e. sshd.
This combination can lead to a locked scope. It's better to be cautious & be critical on the changes found on new FW's.