Using Ruby to send SMSs

I'm trying to code for an sms server using the following tutorial.

http://lukeredpath.co.uk/blog/sending-sms-messages-from-your-rails-application.html

Here they advice us to use clickatell but i have a gateway that i can use which i would like to use. However i wouldn't开发者_JAVA技巧 know how to write the bits of code that says require clickatell or sudo gem install clickatell. I'm new to ruby and rails hence any help would be appreciated :)

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In Gemfile:

gem 'clickatell`

Then run bundle install.