Not to Noffke.
Implied in "best address I can give you", which seems pretty clear that its not where he's at or he wouldn't have supplied the qualifier. When someone asks me the address of my house or another location of where to meet them, I don't say "well, the best address I can give you is ... Also would be implied in the response to the question of what address his car is parked in front of and when giving directions to his truck, does not mention the name of the street he's on.
He was not. He volunteered the address of the clubhouse.
Good correction. It actually shows more clearly that GZ doesn't know the address of where he is as it wasn't a response to a dynamic question, but his own offering that he had time to consider and felt was an important fact. That GZ doesn't say he's at the clubhouse and gives the indication that the address he is giving out is his current location, to me is an indication that he was at a different location at that time. It would seem to make sense that if he didn't know the address of his current location, that he would give the clubhouse address (which he is near) as the best address he can provide. Personally, I believe he wasn't at his final stopping place yet, but had moved from the clubhouse when providing this description of his location.
I don't think it's any indication of his own location.
See above. Have you ever heard anyone say "the best address I can give you is", then supply the actual address as their answer? I would suspect if he was at the clubhouse, he would have said as much. I don't contend to know whether he was just pulling out of the clubhouse, moving around the corner, following the turn on TTL or at his final resting place. I think its clear he's not at the clubhouse at that time.
Why do I think GZ can see his truck as he's talking to dispatch? Because when Sean first asks about meeting officers, GZ is describing directions to his truck (again giving no street name seeming to validate he doesn't know the street to Sean) and says thats my truck, then something else that isn't entirely intelligible. The statements and context (along with the unintelligible statement that appears to be centered on the truck) lead me to believe he can see his truck at this moment. Then of course there is his testimony that he never veered from the top of the 'T', which would mean his vehicle would have been visible at all times.