When trying to search for "goto" on merriam-webster.com or dictionary.com, it redirects to go-to. Often, entries will state that what you were trying to search for is a common misspelling, but that's not the case here.
Now I'm curious if there's anything about goto on oed.com—behind the paywall—within the go or go-to entries, similar to how their entry for more includes a mention of moreso: "[a] 'chiefly U.S.' [variant of more so]" [1]
So, if you have an oed.com subscription, I'd appreciate their excerpts regarding this – if there even is any.