5"8', ~160 lbs, 19 year-old. Isn't GOMAD a bad idea for me? Also, can I run 10k a day while doing SS?

Hey guys, I have about 40 days of summer during which I will be fasting till 6am for 30 of them, and I wanna start going to the gym. Ideally, I wanna lose the "skinny fat" that I have and gain muscle mass at the same time, but I can't do both apparently. And GOMAD seems like a really bad idea for someone who's not REALLY skinny.

What are your guys' suggestions for me? I know I wanna do SS during this period of time (was also planning on improving my 5k runs and start going for 10k to get closer to my half-marathon-able goal, but I assume I can't do that while going for muscle mass either?) , I'm just not sure what to do diet-wise. Advice?