Yes ginger ale is good to drink after vomiting.
Drinking some ginger ale after vomiting can help settle your upset stomach.
However I would wait a few minutes after vomiting to drink the ginger ale otherwise you might throw the ginger ale back up.
So give it a few minutes after you vomit and then slowly sip on some ginger ale.
Even if you have just an upset stomach drinking some ginger ale can help settle the upset stomach.
Ginger Ale has been a good home remedy for settling upset stomachs, nausea and helping with vomiting for years.