What is the meaning of Gahn?

to go

to walk

to walk (some distance); to go (usually) by foot

to leave

To lead (in a direction).

To proceed (well or poorly).

to be going; to be alright; indicates how the oblique object fares

Used to form the future tense of a verb, together with an infinitive.

To start to, begin to, to be going to

to be possible

to work, to function (the verb warken is also used in that context)

to be in progress; to last

to approach; to be going (on some one)

Source: wiktionary.org