To cite package ‘gchartsmap’ in publications use:

  de Leon O (2025). _gchartsmap: Access 'Google Charts' Map Data_. R
  package version 1.0.1, <https://github.com/odeleongt/gchartsmap>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gchartsmap: Access 'Google Charts' Map Data},
    author = {Oscar {de Leon}},
    year = {2025},
    note = {R package version 1.0.1},
    url = {https://github.com/odeleongt/gchartsmap},
  }