I am on L-1 visa until 2015, according to my employer's attorney the I-140 form was already approved, now my employer does not want to continue with the I-485 form process (because they don't want to pay attorney's fees) and will not release any information related to my case, do I have any chance to continue with the GC process by myself? Or will I be facing deportation at the L-1 visa expiration date?
There is no problem with you paying the I-485 fees. But the employer must be involved to the extent that they need to provide a (truthful) letter evidencing continuity of your employment.