The issue of using RG methodology for the assessment of researchers is not new. See previous discussions: https://www.researchgate.net/post/What_is_the_true_scientific_value_of_the_RG_score https://www.researchgate.net/post/What_is_the_best_way_to_evaluate_a_researcher
A recent paper “ResearchGate: An effective altmetric indicator for active researchers?” by Min-Chun Yu, Yen-Chun Jim Wu, Wadee Alhalabi, Hao-Yun Kao, Wen-Hsiung Wu provides empirical evidence that demonstrates that the ResearchGate score can be an effective indicator for measuring an individual researcher’s performance. When used along with other bibliometrics—such as impact points, number of citations, and number of downloads—ResearchGate can provide comprehensive measurements for researchers, institutions, countries, and even research disciplines. https://wlv.openrepository.com/bitstream/handle/2436/621190/ResearchGate.pdf;jsessionid=4942D4E519E3DA238879E4AEC49F1CC8?sequence=1
My answer to this question will be "No". Why? Because some excellent researchers or experts have not yet registered themselves on Researchgate or barely use it to advertise their research work. Moreover, scores on Researchgate can not be used to judge the researchers level
because many different things are taken into account when Researchgate calculates the score of a researcher. Indeed, on Researchgate, it is common to see a researcher with one or two published papers who has a score which is higher than another researcher who has more published papers. As far as I am concerned, the best way to judge a researcher level, it is by having a look to the number of published papers that he or she has, and by reading the papers in which that researcher is considered to be the first author. Through reading the researcher's paper, one can have a concrete opinion on the research level of the researcher.