title: How to set selected value when using g:select in grails
body: <p>I'm newbie with Grails framwork.
  I have issue:</p>
  
  <p>I have Domain is: "Country". And I wants to show list country in select tag by using g:select in Grails</p>
  
  <h2>For example: The data store in database can see below</h2>
  
  <h2>ID&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Name<hr></h2>
  
  <p>1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; England<br>
  2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Canada<br>
  3&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Germany<br></p>
  
  <p>Now, I wants set "Canada" is selected.
  Who can help me. Please!</p>