Questions & Answers about Ég geng beint heim eftir vinnu.
Geng is the 1st person singular present tense of the verb að ganga (to walk / to go on foot).
So Ég geng literally means I walk (or I’m walking, depending on context).
In Icelandic, að ganga primarily means to walk (go on foot). It can also be used more broadly in certain contexts (like “things are going well”), but in a sentence with a destination like heim, it’s normally understood as walking.