As an additional data point, a former client (female) addressed our mixed-gender team as gals. This is something the article explicitly calls out as taboo. It didn't bother me (male) at all nor did it seem to alienate anyone on the team. Disclaimer: I use "guys" as mixed gender a lot and this slack bot would really piss me off; the opposite of "valuing, respecting, and supporting the needs of every individual".