Grails controllers

I have a form similar to this one in Grails:

Name: _____

Age: _____

Street: _____

Email: ____

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How can i pass all the filled in information to a controller that will add me the records to the database? Im kinda new to Grails, and my problem is i dont understand how to "pass" and get things to the controllers.

---

class Person {
   String name
   Integer age
   String street
   String email
}

class PersonController {
    def save = {
        def personInstance = new Person(params)
        personInstance.save(flush:true)
    }
}

<g:form controller="person" action="save">
    <g:textField name="name" />
    <g:textField name="age" />
    <g:textField name="street" />
    <g:textField name="email" />
    <g:submitButton name="save" value="Save" />
</g:form>

Also, if you have a domain, you can run

grails generate-all com.foo.Person

And all the code will be generated for you. Then you can see how it is done.