Hello,
Unfortunately, yield groups are not support via API and will need to use the UI. There isn't a current timeline for when they will be exposed but you can follow our
blog for upcoming features in releases. To filter report by Yield partner = "DoubleClick Ad Exchange", did you try adding a filter for "Yield group partner type" and selecting "DoubleClick Ad Exchange" in the drop down? I have attached a screenshot of what it looks like on UI. We only have that diagram for the basic entities. Are there specific entities you have questions?
For the advertiser id returned by GPT, that can be better answered by our Product team. Please post any other product level or UI questions on their
forum.
Thanks,
Nicholas Figeac, DFP API Team