Unluckily for them both, Garrot ended up taking a quick leap into the ocean during those twenty minutes. This means that when he gets back to his phone, it doesn't seem like it took that long for Gyre to respond. And who looks at timestamps?

Please pig out on the food if you need to, I'll be fine. And I'm you from the future.

Couldn't you tell?

He doesn't want Gyre to go hungry after a day like this! He should eat!!! Garrot has some food in the fridge at his temp house anyway...