Positive:
* Good-bye: A farewell greeting.
* Good-humored: Pleasant and cheerful.
* Good-natured: Kind and friendly.
* Good-looking: Attractive.
* Good-hearted: Kind and compassionate.
* Good-natured: Having a pleasant and friendly disposition.
* Good-for-nothing: A worthless person. (Ironically, this is negative.)
Neutral:
* Goodwill: Friendly or kindly feelings.
* Goodman: A man of good character.
* Goodnight: A greeting used at bedtime.
* Goodwife: A woman who is a good homemaker.
Negative:
* Good riddance: A phrase used to express relief when someone leaves. (Can be considered negative.)
* Good-for-nothing: A worthless person.
Other:
* Good-bye (as mentioned above)
Let me know if you'd like me to expand on any of these!