I don't think they literally mean that you will find a hidden portal in the game.
Travel through the dawn to the p@ss pictured in our brochures.
Since one cannot go through the dawn, dawn must be a code word for something other than the time of day. Using a simple thesaurus you get; first light or aurora. First light could mean a lamp post or a street light. P@ss might be a noun either but a verb as p@ss by or to move beyond. So then the pictured could be replaced with displayed or some other meaning. Go though the first light beyond our books.
Look for a red truck with a dent on the right fender.
This might seem all to simple but the sign does have 4 tires on it. Also it is locally centered very close to all the blue light activity. So four tires and 4 directions N, E, S, and W.
Raise your left hand and recite the words: "Take me to to my father-father, brother-uncle. Kifflom." We'll do the rest. Because we all know, there is Kifflom and there is Krant, and both be praised.
I am of the opinion you will find words will hold more meaning than actions at this point. That is just my opinion.