A straight answer from someone who is a similar build (just add a couple of inches and 10-12lbs) is that it added too much fat, thankfully it went away quite easily though when I did HIIT. so I did retain some bennefit from 6-7 weeks of it. I did only do about 1/2 or 3/4 gomad though as I had already recently upped my calories by other means and a GOMAD would have had me hitting around 4800 cals - too much IMO - went for something around 4k.
So yea I'd just go with the above - my strength did go up, but in terms of ratio (lean vs fat, strength vs weight gain/fat gain) it was hardly optimal, my blood test also showed elevated potasium which (although I have no real evidence of) I believe was due to all the milk I was drinking.
Thanks for the first-hand info. I see the GOMAD plan advertised often for skinnies which I am really not. The funny thing about my body I guess is that I can gain weight like crazy when I eat starchy carbs but then my stomach ends up a total mess - started a few years ago. Then, when I eat paleo, I can't stop dropping weight. So when I'm lifting it's tough for me to find the right balance of inputs to stop the slow creep downwards. I literally can eat probably 3 lbs of meat a day and a couple pounds of veggies and still lose weight. But like Stu said it's probably that the meats I eat are too lean.
And like I have said in a couple other posts outside of this thread, after lifting days I am literally STARVING.
I'll try the fats and see what happens.