How to download and setup github-gmail
Open terminal and run command
                                            git clone https://github.com/muan/github-gmail.git
                                        
                                        git clone is used to create a copy or clone of github-gmail repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with github-gmail https://github.com/muan/github-gmail/archive/master.zip
Or simply clone github-gmail with SSH
                                            [email protected]:muan/github-gmail.git                                    
                                    If you have some problems with github-gmail
You may open issue on github-gmail support forum (system) here: https://github.com/muan/github-gmail/issuesSimilar to github-gmail repositories
Here you may see github-gmail alternatives and analogs
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