She attended Longdean School, a specialist maths and computing academy in Hertfordshire and Oaklands College in Welwyn Garden City where she studied Information and communications technology.
In 2011 Gatehouse was scouted in London by Angel forever, where she modelled their jewelry as well as prom dresses.
After wearing a Mac Duggal gown in the Miss Teen Galaxy International competition, she was invited to be Mac Duggal's model of the month for the November issue.
She then flew to Florida to represent England in Miss Teen Royal Dynasty International, where she won as well as took home the awards of Miss Photogenic and Supermodel.
By winning Miss England Earth, Gatehouse flew to the Philippines in November to compete with almost 100 other candidates to be Alyz Henrich's[9][10] successor as Miss Earth.