Well, Gamora's back story in Avengers Infinity War is quite tragic. She was from a race that Thanos decimated. He then took her in, not out of kindness but for his own purposes. She learned combat and survival skills from Thanos. However, she always had a moral compass that was different from her 'father'. This led to her being in a constant struggle within the story, especially when it came to the location of the Soul Stone, which Thanos needed. She tried to keep it from him at all costs.
Before the events of Avengers Infinity War, Gamora's life was shaped by Thanos. She was orphaned by Thanos' actions on her home planet. Thanos then took her under his wing, but it was more like a prison. She had to endure his brutal training methods. However, she used the skills she learned to plot against Thanos. She joined the Guardians of the Galaxy, which gave her a new family and a new purpose. Her past experiences made her determined to stop Thanos from getting all the Infinity Stones, as she knew the destruction it would bring.
Their relationship would likely deepen. The impending arrival of a baby would bring them closer together on an emotional level. They'd have to communicate more about their hopes and fears for their family. For instance, they might have long talks about what kind of values they want to instill in their child.
Another plot could involve them preparing for the arrival of the baby. They could be seen shopping for baby supplies in different alien markets. Quill would be clueless about most things, while Gamora has a more practical approach, leading to some comical situations.
Gamora's fate varies in different comic arcs. Sometimes she meets her end, but her story often has complex twists and turns. In some cases, her death is part of a larger narrative development or a sacrifice for a greater cause.