Will earth be affected in anyway by moving through a neighboring interstellar cloud, such as the g-cloud?

i’ve heard people (mostly conspiracy theorists) claim that the g-cloud will “block out the sun” or that it “contains dangerous particles.” is any of this true? could earth be harmed once we leave the interstellar fluff and enter the g-cloud? https://en.m.wikipedia.org/wiki/G-Cloud
7 answers 7