I guess so - but the God here is defined as a non-religious / non-personal / perhaps even non-supernatural creator 
In deism it is defined that way, yes, broadly. But not in atheism. 
Gods don't feature amongst the things atheists believe in.
Well I personally wouldn't call someone who believes in a deity an 'atheist', I'm just saying it would be a useful definition. 
Useful how? And to whom?