I'm not trying to be a dick, but the reason your not receiving any answers is because your questions are much to vague/impossible to answer.
For example, the GPH for a drip system is not a set number. You have to watch the plant, determine how quickly your growing medium drains water, (this will change as the roots expand), determine how much water the plant is drinking, (I've seen plants drink over 1 gallon a day during flowering), along with many other variables.
Your best bet would be to look at other grows using similar systems, as that will provide the most information that you are looking for. (Which you said was a general description of how many GPH for how many days at what stage of growth.)
Also, I'm just curious, what made you decide to go with a drip system rather than Deep Water Culture for example. Because I always found drip to have
too many variables, whereas in a DWC setup you essentially just watch TDS and PH. (Plus plants grow way faster in a soil-less medium!) I actually started my grow as a drip, and it was such a huge pain in the ass that I switched it to DWC, and I must say, I'm much happier!
I would really like to help you out, so ask me some more questions and I'll see if I can help. Please keep us posted!