As a speaker of Esperanto, I believe they used the Esperanto for the noun "forge" which is spelled 'forĝejo' with a facy-pants g-circumflex.

In Esperanto, the G with a hat is pronounced like the soft G in forge. The J is pronounced like the letter Y, like in the English word fjord.

So, I don't know if the makers of the tool intended the Esperanto pronunciation to be used. But if it is, the pronunciation would be like forge-AY-o.