Gabrielle Lyon is not widely recognized as a mainstream author, so there may be several individuals by that name with different professions or with a limited public presence. However, if you are referring to a specific Gabrielle Lyon known for a particular work or field, some more context would be necessary to provide a proper description. Without additional information, I can't provide a detailed description. Please provide more details or specify the domain in which Gabrielle Lyon is known (e.g., literature, academic research, activism), and I'll do my best to assist you.