Fast Tract has no gluten but many people who are gluten free can take it as it is pre-digested and therefore usually okay.

If you read the page on In-Liven here:

What if I think I am allergic to the ingredients in In-Liven?

Allergic reactions to grains are generally caused by:

1. Compromised gut bacteria resulting in the body’s inability to break down the protein (gluten) in the wheat.
2. A reaction to the synthetic chemicals used to grow the wheat.

The In-Liven formula has been pre-digested by the lactobacilli bacteria, so all the protein has already been broken down, and all the ingredients are certified organic, eliminating the use of synthetic chemicals.
Hence why we say to take Fast Tract first, to populate your gut with good bacteria first.