If someone interested.
I got 0,24 GBX on pool
https://asia1.gobyte.network/after 24 hours of mining. It's about $2.88. Electricity costs was $2.40 based on $0.1 / kW/h rate
So, I earned $0.48 per day on 8 * 1070 GPU.
In a month it could be $14.4 of course if difficulty will not rise.

Really? It sounds not profitable to mine Gobyte at the moment with current difficulty and price. I think miners should choose other coins to mine, then sell them, and buy Gobyte if they want to own this one in their portfolios. I don't see any reason to keep mining Gobyte if your calculation is correct.
Yep, I think it would be smart decision.