GFFM overview is a web-based platform that provides researchers with an interactive visualisation of the gene family evolution process. It is an online tool that enables users to explore the evolution of gene families across different species. GFFM overview provides an overview of gene family evolutionary histories, allowing users to identify the evolutionary path of particular genes within gene families. In addition, it offers various features to help users explore gene family evolution, such as the ability to filter data, to compare multiple gene families, and to view gene family trees. GFFM overview can be used to better understand the evolutionary relationships between genes and gene families and to identify potential sites of gene duplication.