The Nine of Cups indicates that Gianna is happy and satisfied with the fresh start in her life. This card shows a feeling of gratitude and a positive mindset, which can help create a strong and lasting relationship with the person you started the relationship with. Furthermore, the card also represents Gianna's emotional and physical health. The Nine of Cups tells us that she is well balanced and well prepared to face any challenges the relationship may bring.
The Queen of Pentacles tells us that Gianna is also a strong, decisive and resourceful woman. This card also shows her intuition about her, her ability to make informed decisions, and her communication skills, all qualities that will serve her well in her relationship. Furthermore, this card also speaks to Gianna's financial health: she will be able to manage her finances responsibly and make informed decisions regarding the economy of the relationship.
In conclusion, the two cards suggest that Gianna will be fine in her new relationship. Not only is she ready to put herself on the line emotionally and financially, but she also possesses the poise to face any future challenges. So, answering the question, I would say yes, Gianna will be happy with her relationship.