So is God in time, outside of time? I won't pretend to try to understand it all. I do know that time can be a different thing to different people depending on the speed one is going and I"m talking about speeds up to near the speed of light. Of course no human has gone to such speeds but atomic accelerators have demonstrated this or we could say the things that Einstein showed with relatively.
But to say there is no time in eternity or Heaven....seems to me there's sequencing that takes place and any time there's sequencing, stage one, stage two, stage three.....well it would have to be considered time of some sort.
eg. The martyrs in Heaven observed something.....they then responded to the Lord with a question. Rev 6.: 9....he then answered and then they came to an understanding of his will. That's an example of sequence so that can only be considered an example of time of some sort. What do I mean by that? I don't know but anything that has sequence I have to believe could be considered as time.