Please note that ResearchGate is not a journal, therefore it cannot have an Impact Factor. See also "Is ResearchGate a publisher?" in https://help.researchgate.net/hc/en-us/articles/14292596164753.
Dear Ijaz Durrani : RG assigns DOIs only for unpublished research, e.g. preprints or unpublished reports, see https://help.researchgate.net/hc/en-us/articles/14293044585745-ResearchGate-DOIs. A DOI does not mean that the object is a publication. DOIs are just identifiers for digital objects. Datasets and other digital objects that are not publications can also have DOIs.