I've written that "guys" is not gender-neutral. Apparently Gen Z agrees. New poll (N=1,500) finds >50% of respondents (ages 18-26) are opposed to using guys to refer to men and women at work. Only 30% were in favor of guys as a catchall.
https://www.newsweek.com/generation-z-calling-men-women-guys-work-poll-1797105
Gen Z Feel Strongly About Calling People 'Guys' at Work

More than 50 percent of young adults believe it's not OK to refer to males and females as "guys," according to exclusive research for Newsweek.

Newsweek
Here's my "guys" Fast Company article with lots of gender-neutral alternatives.
https://www.fastcompany.com/90629391/guys-is-not-gender-neutral-lets-stop-using-it-like-it-is

@amydiehl
Thank you for this. Very useful

You changed a random internet stranger's habits today.

For other usages such as “hey / hi / hello guys,” substitute “guys” with:

all
everyone / everybody
people
folks
team
colleagues
comrades
squad
friends
pals
peeps
party people
lovely people
beautiful humans
Or just say “hey,” “hi,” or “hello” without attaching any other word