[thiht]

Oops my bad, I thought they went with it because it's in Go

If it's "Forgejo" I thing I would pronounce it like in "forget", then "jo" like in jack, not sure if that's close

[taejo]

It's G as in "forge" and J as in "yo".

In Esperanto Ĝ represents that soft G sound and the word is spelled "forĝejo", which breaks into "forĝi" (to forge) plus "ejo" (a place), i.e. a place where one forges.