Training

Commercial providers of Go training

On-line

Mastering Go Programming - A comprehensive Go video training course
Golang - From Beginner to Advanced - Romeo Mihalcea
Golang Tutorials - Sathish VJ - A free online class.
Learn Go - Codementor.io - Beginner level online class.
Learning to Program in Go - Chris Hawkes - Free video tutorial for beginner Go programming.
O'Reilly Go Fundamentals - Video training series.
Pluralsight.com - Offers 5 classes at beginner and advanced levels.
Master Go - A paid online video course on Go for developers
Learn to Create Web Applications using Go - A paid online video course and book about Web programming with Go
Golang tutorial - Learn Go from the best online golang tutorials submitted & voted by the golang programming community.

Ardan Labs - Offering customized on-site live training classes.
Boss Sauce Creative - Personalized or track-based Go training for teams.
Brian Ketelsen - In-person, remote, and online training classes for individuals and companies.
Gopher Guides - Customized In-person, remote, and online training classes. Training for Developers by Developers. Lead Instructors: Mark Bates, Cory LaNou
Web Development in Go - three days, 26th-28th June 2017, London.