Yeah, I used display inline and a background color.
Right-click your text element in the Gridder and choose Set HTML Class and ID.
As HTML class add:
mybg
Enter this css in "lay options" -> "custom css & html" -> "custom css"
.mybg p{
display: inline;
background-color: green;
}
Make sure to turn off the background color that you set in the gridder for the text box as this will not work with that one.