Weight gain and inablilty to gain weight are both symptoms of gluten sensitivity?
There are some bits of correct information on this website. However there is a great deal of misleading and/or incorrect information.
First, how are both weight gain and the inability to gain weight symptoms of gluten sensitivity? They can't both be symptoms!
Next, simple gluten intolerance can be uncomfortable, but the symptoms are fleeting. The good news is that gluten intolerance is not a food allergy, and eating gluten does not usually cause damage - unless you have celiac disease.