I suspect Gale is now a “Good” aligned character ...
As you know, both Gale and Wyll may leave you if you go a dark path so I dunno…
"may" is very important word there ...
If Gale would be indeed Good character, it shouldnt be possible (imho at least) to persuate him to stay with inocent civilians murdering psychopath. :-/
Some time ago i have read somewhere interesting mnemonic aid:
Good character will sacrifice things, in order to help people.
Evil character will sacrifice people, in order to get things.
Neutral character can do either, or try to do both, or neither.So ... neutral at best imho.