I can confirm:The verb "to go" is not only used in Hebrew or German meaning "how are you?".
Spanish: ¿Cómo te va?
French: Comment allez vous? Comment vas tu?
Italian: Come va?
And there may be more...
I can confirm:
Afrikaans:Hoe gaan dit?
Dutch:Hoe gaat het?
But that's not the point. Some of the languages that have had the greatest influence on modern Hebrew are Yiddish, German, English, Russian and Polish (not necessarily at that order). So when discussing the modern Hebrew's "מה הולך" it is of relevance to compare it to those languages and not to others.
When the verb הולך is followed by another verb,But הולך can also mean "going" in the sense of something happening in the future, right? For example, I heard this earlier today:
אני יודע בדיוק מה הולך להיות.
I think it means "I know exactly what's going to happen."