[Southack]

Gravity is the Energy of a Mass, therefore

G=EM

Since we already know that E=MC^2, we can solve for G, giving us G=C^2.

So Gravity is the speed of light squared (just try to ignore the dimensional consistency/inconsistency aspects of that equation).

[RightWhale]

G=EM

What is the indicial order of the equation? We'll need at least three noncoplanar potential vectors.