Im hesitant to even post this as its been a battle to get it working and i dont want to jinx it....
but...
Upgradoh has working google leaderboards now
took 2 weeks lol
there was a few moments i had to subdue the crunch by any means.
https://play.google.com/store/apps/details?id=com.turbogoblin.upgradoh
if anyone needs help doing google leaderboards just ask. IVE SEEN IT ALL.