Long story short: Google just broke every Bokeh GMapPlot everywhere. There is an issue you can use to track this development:
Be advised that, whatever the solution, in the future any use of Bokeh's GMapPlot will require you to provide your own Google API key. Depending on how difficult a solution is to implement, this may also impact the Bokeh 0.12 release schedule (otherwise on track for early next week), although I hope not.
I'll spare everyone my opinion, re: making a sweeping change like this without any warning whatsoever.