Is the existence of God objective or subjective?

Disputable.

In my opinion, existence is always objective. One might subjectively determine (or believe) that something does or does not exist, but whether it in actuality does or does not exist is objective.

But...see philosophers who question existence itself, and argue that existence itself - of anything and everything - is subjective, unknowable and/or imaginary.

The existence of god is objective

The existence of God is fact.

The existence of everything that exists is objective, including God.  The acceptance or rejection of objective reality is subjective.

Unless you are omniscient, everything is subjective; filtered through a screen constructed unwillingly of what you do and what others do to you.

I was going to say more or less what 'Not You' said, but thinking about it, what one even means by 'God' is subjective. Some people regard the Universe as being God, so I suppose God's existence is at least as subjective as its definition.

The question of whether or not a god exists is an objective one. Yet, there's no shortage of people employing subjectivity in their claims of evidence for one. So, it is a good question if they feel that speaks to objective reality, or if they'd agree that is only indicative of personal feelings and opinions.

God is

it can't get anymore objective than that

we don't need word games. Cheesus is real, and dried on the cross for our sins.

The existence of an all-powerful being who created everything, yet doesn't seem to care whether babies get human statue disease, is not up for debate. Such a being, if he existed, would be pure evil.

The non existence of a deity is a matter of objective fact.