Should I write 'god' with a small 'g' or a capital?

god里面的字母g，我该写成小写还是大写？

《牛津词典》

Spacecraft which are re-entering the earth's atmosphere are affected by g forces.

重返大气层的航天器受到重力的作用。

《牛津词典》

P&G applied for a patent on its cookies.

宝洁公司为其饼干申请了专利。

《柯林斯英汉双解大词典》

But there were questions about why new restrictions on companies had excluded contracts dated before February eleventh,including those at A.I.G.

VOA: special.2009.03.20

Now, gravity, well force, is equal to mass times acceleration, g and the acceleration due to gravity is g.

是重力，等于质量乘以加速度，由重力导致的加速度是。

麻省理工公开课 - 热力学与动力学课程节选

G P Thompson And it turns out that G.P. Thompson, and I'm sure this wasn't the case, but I like to think of it as a little bit of child rebelling against the father.

结果是他的儿子，我确定不是那种情况，但是我们认为他在小时候,对他的父亲可能有一点叛逆。

麻省理工公开课 - 化学原理课程节选

It is sometimes marked by a line of debris, e.g. seagrass, pieces of wood.

UNESCO: L O S S A R Y

The way people browse, find products, pay for them (e.g. one-click purchase) are all different.

FORBES: Why E-Commerce Still Isn't Easy To Do

Each allowance corresponds to one unit of emissions (e.g. one tonne of carbon dioxide equivalent).

CNN: Your ask the expert: Carbon trading