Sustained employment is not a requirement for naturalization. Go ahead and file.
Samuel Ouya Maina, Esq. 415.391.6612 email@example.com Law Offices of S. Ouya Maina, PC 332 Pine Street, Suite 707 San Francisco, CA 94104
Your "year off" from work has no relevance to your eligibility for naturalization. The requirements are, inter alia, 5 years as a green card holder and 30 months of continuous physical presence in the US.
If you got your GC through employment-based petition filed by Company A, the IO may not see this favorably. Having said that there are other factors to be considered - when did the petitioning process start, how long was the wait, etc. Consult with an immigration attorney before you apply for naturalization.
This response is general in nature and cannot be construed as legal advice, given that not enough facts are known. Any comments offered on Avvo are of a general nature only, and are not meant to create an attorney-client relationship. If you would like additional information based on this response, please contact my office at 510 657 7665 or 415 902 0832 to schedule a consultation.