Why cant I add my gmail accounts to phone?

I was having problems with my phone because it wont let me add my google accounts back on phone. I was having problems for several hours then I decides to just factory reset my phone then I might be able to reputed my google accounts. But I was wrong it keeps saying having trouble communicating with google servers. I have been working on the phone only over WiFi because I have no networking plan on this phone right now but I need to use it cause it had all my inform stored on this phone before I factory reset it. Please help