What about Rails 2.x ?

A great blog post has been written about this subject. Check this link

To add acts_as_gmappable in your models, [check this gist] (https://gist.github.com/1521322)

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WARNING: You will probably need to update gmaps4rails partial to the last version in the gem, and fix rails 3 sintax, like

<% case options[:map_options].try(:[], :provider)

when "openlayers" %>

instead

<% case options[:map_options].try(:[], :provider) %>

<% when "openlayers" %>

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