I think we won't be able to see anything for the first 3 seconds of the game but we can hear a radio dj's voice and he says something like "Good morning/afternoon/evening Los Santos" depending on what time it is and he could say what the temperature is and how the traffic is doing. We then cut to Albert (if he is the Protagonist) waiting outside the school for his son and they get in and drive home. When they get home, Albert's phone rings and that is where the main missions start.