Reasearchgate score or RG score is based on four factors. These four are publications, questions one asked, answers one wrote and peer interaction. The RG is score is the cumulative scoring of these four factors whereas Google Scholar only uses number of the citations as the basis of scoring. So that's why the scores are different. I don't have any publications right now but I have a RG score of 1.34 which was scored because of my questions, answers and recommendations etc. I hope this helps.

Thanks for your answer. Your information will help me to know the score. But, actually I was looking for citation, not the score. For example, one of my articles citaion in google scholar is 13 times but in Research gate it shows 20 citations. Conversely, researchgate shows no citation in one article but google scholar reflects that was cited by 3 times.

Its because of indexing difference between google scholar and research gate.. RG under-calculate citation counts where citations for non-extractable article (i.e. scanned copy PDF, photo, images) may have varying level of success and usually no calculated. Besides google scholar not calculate citation that not indexed in their database..Hope you can find your answer.

Not all publications are imported in RG database (compared to Google Scholar), thus they are not counted in citations