OGI. Pregame guise codes are a form of pregame pact as they are something done outside of the realm of N1 and beyond that a player establishes in order to afford their alignment an advantage in the game.
A pregame pact is when you make a vow to do something as a particular alignment - that descr doesn't cover pregame guise-codes. Secondly, for the next part of the OGI rule it clearly states it has to be outside of the game /not/ outside of the realm of N1.
doesn't matter, you made a pregame pact. your alignment not benefitting from it doesn't mean that you didn't do something that was made to benefit you had you flipped town.