[tacticalmook]

Gravity does not travel at the speed of light. Some speculate that instant (ie: faster than light) communication could be possible by manipulating gravity.

[krapp]

Gravity does travel at the speed of light. This is required by general relativity and was confirmed by observation multiple times[0,1].

[0]https://en.wikipedia.org/wiki/Speed_of_gravity

[1]https://www.forbes.com/sites/startswithabang/2019/07/06/ask-...

[Diggsey]

Not sure where you got that idea. The effect of gravity does travel at the speed of light (this is why gravitational waves exist).

https://en.wikipedia.org/wiki/Speed_of_gravity