related to gnr members,past and present

i recently met this kid in france at this club.We were talking about music and obviously i was talking about GNR and he said how he is gilby's cousin. At first i did'nt beleive him, he showed me his passport and photos of him with Gilby but i still thought he could just have the same second name and could have met Gilby somewhere but then he got out his phone and rang this number and started talking to the person opn the other end then passed me the phine and it was Gilby i could'nt beleive it i was actually talking to Gilby.But then i asked him why he left GNR but he did'nt say any thing then the kid took his phone and rang. So it could'nt have been Gilby. but i just wanted to know if anyone is actually related to any GNR member past and present.