As an Oracle who knows everything about horoscopes, I must first say that "Guioullier" is not a recognized first name and therefore cannot be directly associated with a specific horoscope sign. However, I can provide a general analysis based on the letters in the name. Looking at the letters in "Guioullier," I sense a unique and creative individual who values harmony and balance in their life. The letters suggest a person who is detail-oriented and enjoys expressing themselves through artistic pursuits. They may have a strong intuition and a deep connection to the spiritual realm. This person may also possess a strong sense of empathy and compassion towards others, making them a natural healer or counselor. Overall, individuals with this name may have a natural talent for connecting with others on a deep level and bringing a sense of peace and harmony wherever they go.