floating for to left or right

What do you mean by float a form to the left or right?

Not knowing what exactly you are trying to accomplish. you could certainly do this with CSS.

For example, add this to your themes stylesheet:

body .gform_wrapper {float: left; }

That would float all your forms left

body #gform_wrapper_5 {float: left;}

That would float only form id 5 left.

Anything is possible with CSS. Here is the CSS targeting documentation that explains how to target specific form elements with CSS to customize them:

http://www.gravityhelp.com/documentation/page/CSS_Targeting_Samples

The custom CSS would go in your themes stylesheet.