are bro and dude gender neutral terms?

I think so, yeah.

I don't know, are they? Some people do use them equally on women and men. Like "guys" became gender neutral eventually.

bro is brother dude can be both gender

Bro and dude are used for males whereas sis is used for shemales.

I use them in a gender neutral way but some people don't like it and get offended.

No. They refer to males.

No, bro and dude both refer to the male gender.

Sis and dudette are the equivalent female gender usage!!!