Best answer by ChrisMTucson
The courses of the Google IT Support Professional Certificate (GITSPC) are somewhat less in depth but on a wider variety of topics than the A+. At the end of the course, you'll probably know more about networking and server management than you'd need to for the A+, but not enough about specific connectors or ports.
The first course starts out much gentler than any A+ study materials I've seen, so if you're a beginner (like I was), I recommend at least looking at the first GITSPC course to get familiar with some of the hardware before going too far in depth on form factors, standards, port names, etc. By the time you've completed all five courses, you have a lot of information under your belt, some of it applicable to the A+, but some of it beyond the scope of that exam. As the courses start with fundamentals and move on to more in-depth networking, OS management, SysAdmin/server management, and security, it provides a great foundation for A+, Net+, Sec+, MSPC, RHSA, LPI, and more. I feel way more confident in my ability to work on and achieve those types of certifications now that I'm not floundering around and vaguely unaware of what those fields actually consist of.
tl;dr: The course isn't an A+ study guide, but it can definitely help you nail down some of the fundamentals. When you've finished it, you'll find that you feel pretty confident with a surprising number of the exam objectives for A+, Net+, and Sec+, which will reduce your total study time if you go after those certs.