How do I Put Text beside Thumbnail Image instead of Under?

Do you have a link to your site? Probably can be done using CSS only, but depends on the theme you are using.

Adding this code to the end of style.css file will probably work

.gallery-thumb {
    clear: both;
}
.gallery-thumb .size-thumbnail img {
    float: left;
}

You are welcome. You can add margins like:

.gallery-thumb .size-thumbnail img {
    float: left;
    margin-right: 10px;
    margin-bottom: 5px;
}

Welcome! Have a nice day.