My 208 is a much older model and to be honest, I never thought of the electronics box as being watertight. Mine has a drain hole and a plastic tube to drain it if it gets water. I always store the boat ( well almost always) with a helm cover on it. I don't like water running down the dash and/or over the switches.
That said, I would try to see where the water is entering the box,which edge or area. I suspect that the top edge is leaky since water at the bottom wouldn't leak in. If leaking at the top, look at the gasket for gaps but I think that maybe the upper edge is just not in far enough to make a decent seal. To correct that you would need a thicker foam gasket but that won't completely help if ONLY the upper edge is not seating. What might work, is to fashion some shims to be placed under the lower hinge flanges that attach the plastic door. That would move the door closer to the opening and hopefully better press against the gasket.
I do agree that you should contact the dealer and Grady first though. The issue could be a bad mold and that is much more of a deal to fix.