On my website http://tehcoffee.com/ the gmaps4rails gem is not working. (except for the individual shop page http://tehcoffee.com/shops/1 where I’m calling it the simple way)
The bizarre thing is that it works on DEV. (I can paste source code if it’s needed)
the gmaps4rails gem is up to date 10.2
It’s being hosted on heroku.
I guess you didn’t update something on your prod server (the gem itself or some cache).
Actually, here is an abstract of your html:
Two things here tell me the gmaps4rails (or html cache) isn’t updated:
all empty fields are now removed to make js code lighter
longitudeandlatitudehave been replace withlngandlat