No, even if gravity were stronger, it would not allow us to travel faster than light using a spaceship. According to our current understanding of physics, the theory of relativity, the speed of light in a vacuum is an absolute limit. It is commonly denoted as "c" and is approximately 299,792,458 meters per second.
The theory of relativity establishes that as an object with mass approaches the speed of light, its mass increases, and the energy required to accelerate it further also increases. As an object with mass approaches the speed of light, it would require an infinite amount of energy to reach or exceed the speed of light. This means that no matter how strong gravity is, it cannot overcome the limitations imposed by the speed of light.
In addition to this fundamental limitation, the theory of relativity also tells us that as an object with mass accelerates, its energy and momentum increase, approaching infinity as the speed of light is approached. This would require an infinite amount of energy to accelerate a massive object to the speed of light.
Therefore, regardless of the strength of gravity, the speed of light remains an insurmountable barrier for travel.