Hard to know. Is her reflux under control currently and are there any other symptoms? It would be useful to repeat the bloods before trialling gluten free again. I would suggest you discuss it frankly with the paediatrician and follow their advice.
Gem's experience is this: IgG gliaden of about 30 and definite reaction to gluten (mostly diarrhoea) so was gluten free from the age of one to two years. Gluten reintroduced with no increase in symptoms. Reflux deteriorated so trialled gluten free for three weeks with no improvement so gave up. By age four years reflux was totally out of control and she had been off medications for six months so had repeat bloods and gastroscopy before restarting medications. IgG gliaden still raised and we were desperate so she went gluten free and back onto Losec. Reflux took some time to improve and she definitely relapsed when she had gluten.
I think the thing to recognise with gluten sensitivity is that for some people the symptoms may creep up. Sorry I know there were no real answers here for you.
