I think people take all of this stuff a little too seriously. Years ago I took EVERYTHING into consideration, made good progress, but constantly found myself thinking, what time is it, what do I eat here, how will this affect me, ect.. Then I decided not to take this as seriously (concerning ideas such as carbs in the morning affect GH, and so on). I'm not saying I just stopped working out and started eating pizza rolls all day, I just didn't pretend that I was prepping for an international bodybuilding competition. Turns out, I still made good progress as I got older, still looked good, just wasn't paying attention to EVERY fine detail.
I'm just saying, to make good progress, you don't have to be THAT detail oriented. Now, if that's what you want, then of course go for it. But I eventually realized that my goal was to look good, not to compete.
Even if you're trying to lose fat, I say it's okay to eat carbs in the morning, just figure out what you need. Don't worry about an insulin spike affecting GH levels, it's not like eating carbs is going to kill your muscle tissue or anything.
If you're trying to gain mass, then yeah, definitely eat carbs in the morning.
This reminds me of a guy on here once asking if he should wear socks when he sleeps because he'd heard that improved circulation would increase his GH levels at night. Hahaha