How to get help on Windows command line for MinGW64, C/C++ language keywords and library functions?

I try to get the Windows command line to show MinGW64 online help manual on Windows 10 Pro 64-bit, similar to the command "man command_name" executed in a Linux terminal (which shows verbose online manual help for the stated command_name as seen here @1.42).

GCC has been added to the environment variable PATH and is available globally.
However on doing a gcc --help in both a Windows command prompt window or a PowerShell console, no "man" command is available for Windows.
I tried also using other help commands like:

gcc --help command_name  gcc --help "command_name"gcc --target-help command_namegcc --target-help "command_name"gcc --help = {command_name}gcc --help = {"command_name"}

But output is always the error message:

gcc: error: command_name : No such file or directory

MinGW64 reference docs do not provide any sample code.

How to get the help manual from the command line in Windows cmd / PowerShell?