I’ve already posted this comment and the solution here :
http://roots.io/style-gravity-forms-with-bootstrap/
The code supplied here to style gravity forms doesn’t support the complex fields (.ginput_complex fields), e.g. addresses or email (with confirmation) ?
These specific fields sit next to each other and have the additional fields .ginput_right and .ginput_left
I think I’ve solved it with the following css :
/* Gravity Forms complex containers */
.ginput_complex .ginput_full { width: 95% !important; }
.ginput_complex .ginput_left input { width: 95% !important; }
.ginput_complex .ginput_left label { width: 95% !important; }
.ginput_complex .ginput_right input { width: 95% !important; }
.ginput_complex .ginput_right label { width: 95% !important; }
.ginput_complex .ginput_full input { width: 95% !important; }
.ginput_complex .ginput_full label { width: 95% !important; }
.ginput_complex .ginput_left { width: 48%; float: left; }
.ginput_complex .ginput_right { width: 48%; float: left; }