Avoid the annoying issue where tabbing from a field in one form tabs you to a field in another form. This is caused by conflicting tab indexes.
This is most common when loading a Gravity Form on a page which is loading a non-GF form (like the WordPress comment form). You’re typing away on your Gravity Form and tab to the next field. Awesome. Except the next field is a completely different form. This snippet sets the starting index of your Gravity Form inputs ridiculously high so such conflicts never happen again.