Yes, you can send your confirmation of participation and / or your Go! Forgerman certificate as part of your visa application to the German
Submit consulates and embassies.
They provide proof of the language level you have achieved according to the Common European Framework of Reference for Languages (GER). In addition, this shows that you are willing and able to learn the German language. As a rule, you will continue your German courses in Germany before you start studying, training or working.
An exception is the Start 1 (A1) certificate from the Goethe Institute, which is mandatory as part of a visa application for family reunification.