HELP PLEASE WITH MY G1 PHONE!!!!!!?????

hey anyone HELP PLEASE!!!!!! ok here i forgot my gmail on my g1 phone never had a gmail before and i created it on my g1 and now forgot my gmail so y phone is now on lockdown cant do nothing what can i do to get it back help please you can contact me at slick_ric_763@hotmail.com it would be so helpful if anyone can help thank you