Short answer
No. If a creator God exists, that God's commands or intentions are not the "definition" of good. This is the basis for the Euthyphro dialog of Socrates. Power =/= morality.
Longer answer
One of the more effective critiques of religious thinking is to apply moral tests to the claimed character and actions of a God, to see if they comport with that God being "All Good". The most famous of these tests is the Problem of Evil, but there are multitudes of other such tests that one can do on more specific claims and behaviors that religions make.
Earlier generations of atheists often conceded that being religious led to moral behavior, but the New Atheist movement from around the turn of this last century did not concede this point, and emphasized moral critiques of religions. This was explicit in a number of their book titles, such as "God is Not Great".
There are a variety of religious responses to these attacks. One is to double down on command ethics, and assert that morality is defined as obedience to power, and our moral intuitions otherwise are simply wrong. This runs counter to basically all other moral thinking, and also runs afoul of the Eden story where humans receive a valid divine moral intuition from the apple. A second is to admit that God is not moral, and declare that morality does not apply to God. This second approach is to concede that the Omni-God hypothesis is false, and give up on omni-benevolent. The third approach is to assert that God is both creator AND good, therefore obedience and goodness have no conflict. This third approach then must deal with the failed test cases, and will generally have to modify theology to comport with our morality (rejecting scriptural or other evidential sources), or rationalize evil behavior as "good", effectively redefining "good" and making it a meaningless independent standard, per the first option.